
     
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                           CAVIAR(TM) AT INTELLIGENT DRIVES
                                   WDAC140/WDAC280
                                  INSTALLATION GUIDE
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     
     
     ===========================================================================
     RADIO FREQUENCY INTERFERENCE STATEMENT
     ===========================================================================
     
     This Western Digital product has been verified to comply with the limits 
     for a Class B computing device pursuant to subpart B Part 15 of FCC 
     rules.  This does not guarantee that interference will not occur in 
     individual installations.  Western Digital is not responsible for any 
     television, radio, or other interference caused by unauthorized 
     modifications of this product.
     
     If interference problems do occur, please consult the system equipment 
     owner's manual for suggestions.  Some of these suggestions include 
     relocation of the computer system away from the television or radio, or 
     placing the computer AC power connection on a different circuit or outlet.
     
     This digital apparatus does not exceed the Class B limits for radio noise 
     for digital apparatus set out in the Radio Interference Regulations of the 
     Canadian Department of Communications.
     
     Le prsent appareil numrique n'met pas de bruits radiolectriques 
     dpassant les limites applicables aux appareils numriques de la classe B 
     prescrites dans le Rglement sur le brouillage radiolectrique dict par 
     le ministre des Communications du Canada.
     
     Information furnished by Western Digital Corporation is believed to be 
     accurate and reliable.  However, no responsibility is assumed by Western 
     Digital Corporation for its use;  nor for any infringement of patents or 
     other rights of third parties which may result from its use.  No license 
     is granted by implication or otherwise under any patent or patent rights 
     of Western Digital Corporation. 
     
     Western Digital Corporation reserves the right to change specifications at 
     any time without notice.
     
     
                    (C)COPYRIGHT 1990 WESTERN DIGITAL CORPORATION
     
           All other trademarks mentioned herein belong to other companies.
     
     
     ===========================================================================
     IF YOU NEED HELP
     ===========================================================================
     
     If you need additional information or help during installation or normal 
     use of this product, contact Western Digital Technical Support at 
     (800) 832-4778.
     
     To access the bulletin board you need a Hayes-compatible modem, 1200 or 
     2400 Baud rate, and the following format: 8 data bits, 1 stop bit, and no 
     parity.  The Technical Support Bulletin Board number is (714) 753-1234.  
     The Bulletin Board asks some preliminary questions about your modem setup 
     and the type of system you are calling from before the main bulletin board 
     menu is displayed.  Refer to your modem manual for instructions on proper 
     modem setup.
     
     Western Digital also offers related documentation for those users who 
     require more detailed information.  The Technical Reference Manual for the 
     Caviar Drives provides complete specifications and technical information.  
     Contact Western Digital Literature Distribution Department at 
     (800) 832-4778 to obtain a copy of the Technical Reference Manual (part 
     number S0705).
     
     
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                     INTRODUCTION
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     
     ===========================================================================
     OVERVIEW
     ===========================================================================
     
     The Western Digital Caviar(TM) intelligent disk drive provides a 40 MByte 
     or 80 MByte intelligent disk drive as a new, upgrade, or replacement drive 
     for installation in your IBM PC/AT(TM) or compatible system.  The Caviar 
     hard drive is an intelligent drive, which means that the hard disk has the 
     controller circuitry and 40-pin connector attached directly to the drive 
     and doesn't require a slot-mounted controller card.
     
     Because of its compact size (1-inch height), the Caviar drive is easily 
     incorporated into the newest generation of small desktop and transportable 
     PC/AT systems.  The Caviar hard disk is a 3 1/2" drive that can also be 
     used in a 5 1/4" drive bay with a drive frame available from your 
     distributor.  
     
     With an average seek time of less than 18 msec, and a 1:1 interleave, the 
     Caviar operates in high speed, AT compatible systems such as 80386SX, 
     80386, and 80486-based computers.  YOUR INTELLIGENT DRIVE IS PREFORMATTED 
     (LOW-LEVEL), AND DEFECT FREE.
     
     You can use your Caviar drive with Disk Operating System (DOS) version 3.0 
     or later.  It is also compatible with other operating systems such as 
     OS/2(TM), Xenix(TM), and Novell Netware(TM).
     
     
     The Caviar contains an automatic disk head parking feature that parks the 
     disk drive heads in a safe, non-data area when the system power is turned 
     off.  This allows you to move the computer system without damaging the 
     hard disk media.
     
     For more technical information and specifications on the Caviar 
     intelligent disk drive, refer to the Reference chapter.
     
     
     ===========================================================================
     INSTALLATION OPTIONS
     ===========================================================================
     
     There are a number of installation options depending on your current 
     system components and configuration.
     
     o   If your system has a 40-pin connector on the motherboard, the Caviar 
         drive is cabled directly to the motherboard.
         
     o   If your system does not have a 40-pin connector on the motherboard, 
         you need to install an adaptor card and connect the hard drive to the 
         connector on the adaptor card.
     
     o   If you are installing the Caviar drive as your second hard drive (dual 
         installation), the hard drives need to be daisy-chained together using 
         a daisy-chain cable.  One connector attaches to the adapter card or 
         motherboard, and the other two attach to the drives.
     
     If you need to install an adapter card, your floppy drive(s) can also be 
     connected to an adapter card with floppy support, such as the WDAT240.  
     This allows you to remove the floppy controller card from your system to 
     create space for other cards you may want to add.
     
     The Caviar drive is not compatible with non-intelligent drives such as the 
     ST-506 hard drive using a standard AT controller.  If you have an ST-506 
     drive, you need to remove the hard drive and controller card before 
     installing the Caviar drive.  You need an adapter card in this 
     installation unless the motherboard has a 40-pin connector.  
     
     If you have an original IBM PC/AT with a Conner CP342 or CP3022 disk drive 
     installed, you cannot add a second drive.  Therefore, the Caviar drive 
     will not work in this environment.
     
     If you have a PC/AT that is not manufactured by IBM with a Conner CP342 or 
     CP3022 disk drive, you can add the Caviar as a second drive.  You must 
     configure the Conner drive as the master, and the Caviar as the slave.
     
     
     ===========================================================================
     UNPACKING
     ===========================================================================
     
     Western Digital products are designed to withstand normal handling when 
     unpacking and installing the drive.  Be aware of the following precautions 
     when unpacking and installing the Caviar drive.
     
     
     ===========================================================================
     PRECAUTIONS
     ===========================================================================
     
     o   Be careful when handling the disk drive.  Do not drop, discharge 
         static electricity, or cause shock to the drive components.  Doing so 
         can permanently damage the drive and void the warranty.
         
     o   Handle the intelligent drive by the ends to avoid touching the circuit 
         board components.
     
     o   Do not lift the intelligent drive by the faceplate or the circuit 
         board.
     
     o   Once the Caviar drive is unpacked, only place the drive on anti-static 
         surfaces, such as the antistatic drive bag.  We recommend that you do 
         not unpack the drive until you are ready to install it.
     
     
     ===========================================================================
     BEFORE INSTALLING THE DRIVE
     ===========================================================================
     
                                    ** CAUTION **
     
     Remember to handle the drive with care.  Leave the drive in the anti-
     static bag until you are ready to install it into your system.  This 
     protects the components from damage and static.  Remember to handle the 
     drive by the edges to avoid contact with the circuit components.
                                       *******
     
     
     Be sure that you have the following items before installing your new 
     Caviar drive:
     
     o   Computer system manual.
         
     o   DOS version 3.0 or later, or compatible operating system.
         
     o   Operating system manual.
         
     o   A Phillips head screwdriver.
         
     o   A 40-pin host interface cable, not more than 18 inches long.
     
     There are some other items your system may require:
     
     o   You may need to use a power Y-adapter if you are installing the Caviar 
         drive as a second hard drive and you do not have two internal power 
         connectors.  This adapter can be purchased through your computer 
         supplier.
         
     
     o   Some systems require manufacturer-supplied drive mounting rails.  
         Check your computer system manual to determine if drive mounting rails 
         are required.  These rails can be purchased through your computer 
         manufacturer or supplier.
     
     o   If you are installing the Caviar intelligent disk in a 5 1/4" drive 
         bay, you need a 5 1/4" frame, which mounts on the Caviar disk drive.  
         This frame is manufactured by Western Digital and can be purchased 
         through your distributor as a 5.25 Kit or 5.25 Kit + Cable.
     
     o   If your system does not have a 40-pin connector on the motherboard, 
         you need an adapter card to connect the drive.  Usually, replacing an 
         ST-506 drive requires the use of an adapter card.
     
     
     ===========================================================================
     WESTERN DIGITAL DRIVE CONFIGURATION KITS
     ===========================================================================
     
     The following Western Digital kits are available for the Caviar drive from 
     your distributor:
     
     o   WD 5.25 Kit
         The 5.25 Kit contains one 5 1/4" frame, two faceplates with LEDs, four 
         large screws for the drive frame, two small screws for the faceplate, 
         and one male-to-male adapter for connecting the LED cable to the 
         Caviar drive.
         
     o   WD 5.25 Kit + Cable
         The 5.25 Kit + Cable contains an 18", 40-pin interface cable as well 
         as all the contents listed in the 5.25 Kit.
     
     
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                     INSTALLATION
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     
     ===========================================================================
     OVERVIEW
     ===========================================================================
     
     This section provides the steps necessary to prepare and install the 
     Caviar intelligent disk drive in your computer.
     
     o   STEP ONE:    Determining Your Installation Configuration
     
     o   STEP TWO:    Setting The Drive Jumpers
     
     o   STEP THREE:  Installing The 5 1/4" Faceplate And Frame (if you are    
                      installing Caviar in a 5 1/4" drive bay.)
     
     o   STEP FOUR:   Mounting The Drive
     
     o   STEP FIVE:   Installing The Adapter Card
     
     
     ===========================================================================
     STEP ONE:
     DETERMINING YOUR INSTALLATION CONFIGURATION
     ===========================================================================
     
     Once you have all of the items necessary, you are ready to install the 
     intelligent drive in your system.
     
     You may use the Caviar drive as a new disk in the computer, or as a 
     replacement for an existing hard disk drive.  There are two main 
     installation configurations:
     
     o   The drive is cabled directly to a 40-pin connector on the motherboard.
         
     o   The drive is cabled to an adapter card mounted in one of the expansion 
         card slots in the computer.
     
     Both configurations use a 40-pin host interface cable.
     
     If you are using the Caviar drive as one of two hard disk drives in the 
     computer (dual installation), you may use either configuration.  In dual 
     installations, you must use a 40-pin host interface cable with three 
     connectors, and daisy-chain the two drives to the motherboard or adapter 
     card.
     
     Western Digital provides three adapter cards for use with the Caviar 
     drive.
     
     o   The WDAT-140 adapter card supports two intelligent drives.
         
     o   The WDAT-240 supports two intelligent drives and two floppy drives.
         
     o   The WDAT-440 supports two intelligent drives, two floppy drives, two 
         serial ports, and one parallel port.
     
     This manual describes and provides information on the most commonly used 
     adapter card, the WDAT-240.  If you prefer to use either the WDAT-140 or 
     WDAT-440, contact your Western Digital distributor for related 
     documentation on the adapter cards (part number WDATHAIG).
     
     
     ---------------------------------------------------------------------------
     DUAL INSTALLATIONS
     ---------------------------------------------------------------------------
     
     Dual installations require a master/slave drive configuration, where one 
     drive is designated as the primary drive and the other is designated as 
     the secondary drive.  The Caviar drive is compatible in dual installations 
     with other intelligent drives that support a master/slave configuration.
     
     The Caviar drive is not compatible with ST-506 drives.  If your system 
     contains an ST-506 drive, you must remove the drive and controller card 
     before installing the Caviar drive.  Most ST-506 replacements require the 
     use of a Western Digital adapter.
     
     
     If you have an original IBM PC/AT with a Conner CP342 or CP3022 drive, you 
     cannot install the Caviar drive.  The Conner must be configured as the 
     master drive if you are using the adapter card.  If you have a PC/AT 
     compatible computer not manufactured by IBM with a Conner drive, you can 
     install the Caviar as the slave in this dual installation.
     
     If your installation requires the use of an adapter card, it is useful to 
     know that you may also be able to connect your floppy drive(s) to the 
     adapter card.  You may need to connect a floppy drive to the adapter card 
     in order to use the floppy drive if all the card slots are in use, or you 
     may choose to connect the floppy drive(s) to the adapter card to leave 
     space available for additional cards in the future.  If you use the WDAT-
     240 adapter card, you may connect two floppy drives to the adapter card.
     
     Be sure to determine your installation requirements, configuration, and 
     materials before proceeding.
     
     
     ===========================================================================
     STEP TWO:
     SETTING THE DRIVE JUMPERS
     ===========================================================================
     
     The Caviar drive has a jumper block (J8) located next to the 40-pin 
     connector on the drive.  These jumpers define information about the hard 
     drive.  The Caviar drive is initially set for single drive installation.  
     If you are installing the Caviar drive as the only intelligent drive in 
     your system, you do not need to install the jumpers.  This is considered a 
     standard installation, and no jumpers are required.
     
     If you need to change this configuration, contact your distributor for 
     jumper shunts, small plastic brackets that fit over two jumper pins.  
     Using jumper shunts you can designate which drive in a dual installation 
     is the primary (master) drive, and which drive is the secondary (slave) 
     drive.
     
     o   If you have a dual installation (two intelligent drives) you must 
         designate one of the drives as the master and the other as the slave 
         drive.  The jumper pins on jumper J8 need to be configured for the 
         dual installation.
         
         -    To designate the intelligent drive as the master, place a jumper 
              shunt on pins 5-6.
              
         -    To designate the intelligent drive as the slave, place a jumper 
              shunt on pins 3-4. 
     
     o   If your system is a PC/AT compatible computer not manufactured by IBM, 
         and it contains a Conner CP342 or CP3022 drive, you can install the 
         Caviar drive as a second drive.  In this configuration, the Conner 
         drive must be configured as the master, and the Caviar as the slave.
         
         To designate the Caviar drive as the slave to the Conner drive, place 
         jumper shunts on pins 1-2 and 3-4.  Refer to the Conner manual to 
         configure the Conner drive as the master.
         
     
     o   If your system is an IBM PC/AT with a Conner CP342 or CP3022 drive, 
         you cannot install the Caviar drive as a second drive.
     
     To install a jumper shunt on the J8 jumper pins:
         
         1.   Refer to the previous descriptions and Figure 1 to determine your
              configuration.
         
         2.   Using one of the jumper shunts, place the shunt over the two pins
              specified in Figure 1.
         
         3.   Push the shunt into place until it is flush against the base of 
              the jumper block.
         
     
                                    J8
                                   5 3 1
                                   o o o    Single
                                   o o o    (Standard Installation)
                                   6 4 2
     
     
                                   5 3 1 
                                    o o    Dual 
                                    o o    (Master)
                                   6 4 2 
     
     
                                   5 3 1
                                   o  o    Dual
                                   o  o    (Slave)
                                   6 4 2
     
     
                                   5 3 1
                                   o      Dual (Slave)
                                   o      with Conner CP342 or CP3022
                                   6 4 2
     
     
                          Ŀ
                                 JUMPER ADDED 
                           KEY Ĵ
                                o JUMPER       
                                o PINS         
                          
     
                                  Figure 1
     
     
     ===========================================================================
     STEP THREE:
     INSTALLING THE 5 1/4" FACEPLATE AND FRAME
     ===========================================================================
     
     The Caviar drive is supplied ready to install in a 3 1/2" drive bay.  The 
     LED and faceplate are installed at the factory.  If you are installing the 
     Caviar drive in a 5 1/4" drive bay however, you need to perform these four 
     procedures:
     
     o   Remove the factory faceplate and LED
         
     o   Attach the faceplate to the frame
         
     o   Install the LED
         
     o   Attach the frame to the drive
     
     For installation in a 5 1/4" drive bay, you must have the optional 
     hardware in the WD 5.25 Kit or the WD 5.25 Kit + Cable.
     
     
     ---------------------------------------------------------------------------
     REMOVING THE FACTORY FACEPLATE AND LED
     ---------------------------------------------------------------------------
     
     1.  Place the disk drive circuit board side down on an antistatic surface, 
         such as the antistatic bag.
     
     2.  Pull the bottom edge of the faceplate away from the drive until it is 
         free.  Then lift the faceplate straight up to free the hook on the top 
         surface of the drive.
     
     3.  Grasp the LED firmly with small pliers or tweezers and pull it 
         straight out.
         
         
     ---------------------------------------------------------------------------
     ATTACHING THE 5 1/4" FACEPLATE TO THE 5 1/4" FRAME
     ---------------------------------------------------------------------------
     
     1.  Place the 5 1/4" frame from the 5.25 Kit on a flat surface, such as a 
         table.  Place the open end of the frame away from you.  The square cut-
         out on the frame for the LED cable should be on the left facing toward 
         you.
     
     2.  Select either the black or gray faceplate from the 5.25 Kit.
     
     3.  Move the frame to the edge of the table and route the white LED cable 
         on the faceplate through the square opening on the frame.
     
     4.  Insert the plastic tabs of the faceplate through the square holes on 
         the front of the frame.  Place the faceplate flush on the frame.
     
     
     5.  Align the screw holes on the faceplate with the screw holes on the 
         frame.
      
     6.  Use a screwdriver and the two small screws from the 5.25 Kit to attach 
         the faceplate to the frame.
     
     
     ---------------------------------------------------------------------------
     INSTALLING THE 5 1/4" LED
     ---------------------------------------------------------------------------
     
     1.  Remove the two-pin adapter from the small plastic bag of the 5.25 
         Kit.  The two-pin adapter is the small, four-prong connector.
     
     2.  Connect the long prongs of the two-pin adapter to the LED cable 
         connector.
     
     3.  Locate the J4 connector on the circuit board side of the Caviar 
         drive.  This is the connector that held the factory-installed LED.
     
     4.  Turn the drive over so that the drive LED connector is aligned with 
         the square opening of the frame.
     
     5.  Insert the small prongs of the faceplate LED into the drive LED 
         connector so that the P7 label on the LED cable connector is facing 
         down.
     
     6.  Be sure that the LED cable connector is firmly seated in the drive LED 
         connector.
     
     NOTE:  Be careful while handling the drive.  Do not drop or shock the 
     drive, or touch the circuit board components.
     
     
     ---------------------------------------------------------------------------
     ATTACHING THE 5 1/4" FRAME TO THE DRIVE
     ---------------------------------------------------------------------------
     
     1.  Locate the screw locations on the frame for the Caviar drive by 
         looking at the inside of the frame.
     
     2.  Place the frame around the drive so that the 40-pin connector end of 
         the drive is at the open end of the frame.
     
     3.  With the frame around the drive, turn the frame on its side.
     
     4.  Align the two drive screw locations with the two frame screw locations 
         by looking through the holes on the outside of the frame.
     
     5.  Attach the frame to the drive using a screwdriver and two of the 
         remaining four screws from the 5.25 Kit.
     
     6.  Turn the frame over onto its other side and completely attach the 
         frame to the drive by inserting the remaining two screws.  Secure them 
         in place using the screwdriver.
     
     
     Once the faceplate and frame are installed, you are ready to mount the 
     Caviar drive in the 5 1/4" drive bay.
     
     
     ===========================================================================
     STEP FOUR:
     MOUNTING THE DRIVE
     ===========================================================================
     
     
                                    ** WARNING **
     
     You may damage the Caviar drive if the interface cable is not connected 
     properly.  To prevent incorrect connection, use a cable that has keyed 
     connectors.  The female connectors on the interface cable should have 
     plugs in position 20.
                                       *******
     
     If you are replacing an existing hard drive with the Caviar drive, or if 
     you currently have an ST-506 drive, you need to remove the existing drive 
     and controller card.  For instructions on removing your existing drive, 
     refer to your system manual.
     
     You are now ready to install the Caviar drive.  Make sure your interface 
     cable is no longer than 18 inches.  Also, if you are connecting two drives 
     together, you need a daisy-chain cable that has three, 40-pin connectors.  
     You may order this cable from your distributor.
     
     
     ---------------------------------------------------------------------------
     CONNECT THE INTERFACE CABLE TO THE DRIVE
     ---------------------------------------------------------------------------
     
     1.  Connect the 40-pin interface cable to the 40-pin connector on the 
         Caviar hard drive.  For dual installations, daisy-chain the two drives 
         together by connecting them with a three-connector interface cable.
     
     2.  Route the cable toward the motherboard or card slot area.  The cable 
         should easily route from the hard drive to the card slot area.  The 
         cable should not block air flow paths.
     
     3.  Insert the drive halfway into the drive bay.
     
     
     ---------------------------------------------------------------------------
     CONNECT THE POWER SUPPLY CABLE
     ---------------------------------------------------------------------------
     
     1.  Attach the power cable to the power connector on the hard drive.
         
     2.  Attach the other end of the power cable to the power supply in your 
         computer.
     
     3.  Completely insert the drive into your system drive bay.
     
     
     ---------------------------------------------------------------------------
     INSERT MOUNTING SCREWS
     ---------------------------------------------------------------------------
     
     1.  Mount the Caviar drive and frame to the drive bay using four 6-32 
         screws (3/16").  Be sure to use the correct size screws.  Do not 
         install the screws past six threads.  Screws that are too long will 
         damage the Caviar drive.
     
     
     ---------------------------------------------------------------------------
     CONNECT THE INTERFACE CABLE TO THE HOST
     ---------------------------------------------------------------------------
     
     1.  If you have a 40-pin connector on the motherboard, connect the other 
         end of the interface cable to the motherboard connector.
         
     2.  If your installation requires an adapter card, as explained in STEP 
         ONE, install the adapter card as described in the next section.
     
     3.  If you do not need to install the adapter card, close the computer 
         case according to the instructions provided in your system manual and 
         proceed to PREPARING THE CAVIAR DRIVE FOR USE.
         
     
     ===========================================================================
     STEP FIVE:
     INSTALLING THE ADAPTER CARD
     ===========================================================================
     
     NOTE:  You only need to change the defaults on the adapter card if you 
     want to disable the floppy drive or set an alternate address.
     
     
     ---------------------------------------------------------------------------
     CONFIGURE THE ADAPTER CARD
     ---------------------------------------------------------------------------
     
     If you are installing the Western Digital WDAT-240 adapter card, chances 
     are you do not need to configure it.  You only need to change the default 
     jumper settings if you want to disable the floppy drive controller or set 
     an alternate address at 370-377.
     
     
                                        2  4
                                        o  
                                     W1 o  
                                        1  3
                                       Default
                                    Configuration
     
     
                2  4                    2  4                   2  4
                  o W2                    W2                o   W2
                  o                                         o   
                1  3                    1  3                   1  3
            Floppy controller       Floppy controller      Floppy controller
            enabled, primary       enabled, secondary        at secondary
            address 3F0-3F7         address 370-377        address disabled
     
     
     The WDAT-240 adapter card has two jumper locations: W1 and W2.  By moving 
     the jumper "shunts" you can change the definition of the hardware attached 
     to your computer.  You only need to change the W2 jumper if your system 
     set up and hardware differ from the standard installation.
     
     To change the jumper settings, carefully align the jumper shunt over the 
     new pins and push gently straight down until the shunt is firmly seated.
     
     If you need to change the adapter card configuration, do so before 
     attaching any cables or installing the card into the card slot.
     
     
     ---------------------------------------------------------------------------
     JUMPER SETTINGS
     ---------------------------------------------------------------------------
     
     The jumper shunt on pins 3 and 4 of W1 is the factory default setting.  
     You only need to change W1 if you are using the adapter card for a single 
     Conner drive installation in an authentic IBM PC/AT.  You cannot install 
     the Caviar drive as a second drive in this configuration.
     
     For more information on Western Digital adapter cards, contact the Western 
     Digital Literature Distribution Department and request a copy of the AT 
     Host Adapters Installation Guide (part number WDATHAIG).
     
     
     ---------------------------------------------------------------------------
     INSTALL THE ADAPTER CARD
     ---------------------------------------------------------------------------
     
     1.  Locate a 16-bit card slot in your system.  Select a slot as close to 
         the drive(s) as possible.  Refer to your system manual if necessary to 
         identify a 16-bit slot.
     
     2.  Attach the 40-pin interface cable from the intelligent drive to the 
         hard drive connector on the adapter card.  Do not force the cable and 
         connector.  Pin 20 of the connector is blocked (keyed) to prevent 
         incorrect connection.
         
     3.  If you are also connecting your floppy drive(s) to the adapter card, 
         attach the 34-pin connector from the floppy drive(s) to the floppy 
         connector on the adapter card.
     
     4.  Loosen the retaining screw at the end of the selected card slot that 
         secures the card slot cover to the back panel.
         
     
     5.  Hold the top corners of the adapter card and insert it into the card 
         slot, firmly seating the card connectors into the card slot.
     
     6.  Slip the plastic mounting clip at the end of the adapter card under 
         the loosened screw located at the end of the card slot.
     
     7.  Secure the screw with the screwdriver.
     
     Once the adapter card is connected and installed, close the computer case 
     according to the instructions in your system manual.
     
     
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                          PREPARING THE CAVIAR DRIVE FOR USE
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     
     YOUR CAVIAR DRIVE HAS BEEN LOW-LEVEL FORMATTED.  The hard drive is ready 
     to set up and is defect-free.  The drive needs to be high-level formatted 
     so it is able to accept files.  This section of the Installation Guide 
     provides the basics for preparing your drive.  You need to consult your 
     operating system documentation for complete information on preparing your 
     drive for use with your operating system.
     
     Your computer operating system provides an initial set up utility, which 
     is either ROM-based or on floppy diskettes.  The system set up procedures 
     vary from system to system, but each set up procedure allows you to tell 
     the system what type of hardware you are using.  Follow the setup 
     instructions in your operating system manual (MS-DOS or other operating 
     system).
     
     
     ===========================================================================
     SELECTING YOUR DRIVE TABLES
     ===========================================================================
     
     One step in the setup procedure asks you to specify the type of drive used 
     in your system.
     
     o   If you are installing the 40 MByte drive in your system, you need to 
         select DRIVE TYPE 17 from the drive tables displayed during the set up 
         utility.  Type 17 typically defines a drive with 977 cylinders, 5 
         heads, and 17 sectors per track.
     
     o   There is no standard drive type for the 80 MByte drive.  Below are 
         some suggested drive tables.  Use your set up utility to examine the 
         available drive tables.  Choose a table that comes as close as 
         possible to the recommended parameter (980x10x17).  Do not exceed the 
         total number of sectors available on the drive, or 166,628 sectors.
     
     To calculate  the number of sectors available, multiply the number of 
     cylinders by the number of heads by the number of sectors on each track.  
     For example:  980 x 10 x 17 = 166,600.  The table below shows the number 
     of sectors for several different setups.
     
     
     80 MByte Drive Tables
     Cylinders       Heads       Sectors/Tracks          Sectors/Drive
     :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
       980            10               17              166,600 (85.3 MB)
       640            10               26              166,400 (85.2 MB)
       841             6               33              166,518 (85.3 MB)
       980             5               34              166,600 (85.3 MB)
       832             6               33              164,736 (84.3 MB)
      1024             9               17              156,672 (80.2 MB)
     
     
     ===========================================================================
     PARTITIONING THE DRIVE
     ===========================================================================
     
     You may need to partition your drive(s) to overcome certain limitations of 
     your DOS version.  Partitioning allows you to divide your 40 or 80 MByte 
     disk into multiple partitions, which function as separate disk drives.  
     Use the DOS fdisk command to display a series of menus that help you 
     partition your hard disk for MS-DOS.
     
     To partition your intelligent disk:
     
     1.  Insert your DOS system diskette into drive A.
         
     2.  Reboot the system by simultaneously pressing [CTRL], [ALT], and [DEL].
     
     3.  Type fdisk at the A: prompt.
     
     4.  Press [RETURN].
     
     5.  Follow the default options.  For more information, refer to your DOS 
         manual.
     
     DOS versions 3.3 and higher allow you to create a primary partition, 
     create an extended partition, change the active partition, delete a 
     partition, and display partition data.
     
     Your version of DOS determines how you can partition your disk(s).
     
     o   If you have a DOS version earlier than 3.3, you can only address 32 
         MBytes maximum on your drive.  You cannot partition the drive(s), 
         without third party software.  We recommend you upgrade to DOS 3.3 or 
         above.
     
     o   If you have DOS version 3.3 or above (less than version 4.0), DOS 
         allows you to partition larger drives into logical disk drives with a 
         maximum of 32 MBytes per partition.
     
     o   If you are working with DOS version 4.0 or greater, you can use a disk 
         drive of any size.  You are not limited to 32 MBytes.
     
     
     ===========================================================================
     FORMATTING THE DRIVE
     ===========================================================================
     
     Fdisk automatically assigns drive IDs to the partitions.  If you have two 
     drives, fdisk specifies C: as the first partition of the first drive, and 
     D: as the first partition of the second drive.  Subsequent drives are then 
     ordered by letter in order of their assignment.  Refer to your system 
     manual for more information on partitioning drives.
     
     Just as you need to format a floppy diskette before it can accept files, 
     you need to high-level format your Caviar drive to prepare it to receive 
     files.  YOU DO NOT NEED TO DO A LOW-LEVEL FORMAT.  If at some later time 
     you need to perform a low-level format, contact Western Digital Technical 
     Support for information on this procedure.  
     
     To high-level format the first logical drive (the "C" drive):
     
     1.  Type FORMAT C:/S at the A: prompt.
     
     2.  Press [RETURN].
     
     If you designated other drives or partitions during the fdisk routine, you 
     need to format those drives as well.  For example, type FORMAT D: at the 
     prompt and then press [RETURN].  Continue the format process until you 
     have formatted all drives.  When the formatting process is complete, copy 
     all DOS files from the floppy onto your hard drive.  For more information 
     on formatting, refer to your operating system documentation.
     
     
     ===========================================================================
     PREPARING THE CAVIAR DRIVE FOR A NOVELL NETWORK
     ===========================================================================
     
     If you are installing Novell, you must COMPSURF the Caviar drive using the 
     following parameters:
     
     o   Format the  disk                                      NO
     
     o   Maintain the current media defect list                NO
         
     o   Enter media defects                                   NO
     
     o   Number of sequential passes                           DEFAULT
     
     o   Number of I/O random test                             DEFAULT
         
     o   Are parameters correct                                YES
     
     After running COMPSURF on the Caviar drive, enter NETGEN.  Refer to your 
     Novell installation manual for more information on COMPSURF and NETGEN.
     
     
     ===========================================================================
     BOOTING THE SYSTEM
     ===========================================================================
     
     After you have properly formatted your drive(s), you are ready to use your 
     system.  Install the operating system on your intelligent drive and boot 
     your system from your active DOS drive.  Be sure to remove any diskettes 
     from drive A: before booting.  To boot the system:
     
     1.  Simultaneously press [CTRL], [ALT], and [DEL].
     
     2.  The system should respond, and your monitor should display C:\.
     
     Refer to your system documentation for more information on booting your 
     system.
     
     If your system will not boot, or if you are unable to make the new drive 
     the current drive, refer to your operating system documentation to be sure 
     that you ran the system utility correctly, specified the correct drive 
     tables, and that you partitioned and formatted your hard disk(s) 
     correctly.  If your system still won't boot, you may have improperly 
     installed or connected your hard drive.  Re-read the installation 
     instructions provided in this manual to be sure that you installed and 
     connected everything properly.  Refer to the Troubleshooting section of 
     this manual for more information.
     
     It is extremely important to regularly back up the data on your hard disk 
     to floppy diskettes or tape.  Data can be damaged or lost due to a number 
     of unanticipated factors.
     
     Consult your operating system documentation for back up instructions and 
     procedures.  There are also a number of commonly available back up 
     utilities on the market that allow you to save copies of your work onto 
     floppy diskettes or another type of magnetic media.
     
     
     ===========================================================================
     AUTOMATIC HEAD PARK FEATURE
     ===========================================================================
     
     The Caviar drive provides an automatic feature that parks the drive heads 
     when the system power is turned off.  If you need to move your system, be 
     sure to turn the system power off.  The drive heads are then moved to a 
     safe, non-data area, and the heads are locked into place.  This helps 
     protect the disk media and the heads from accidental damage due to 
     vibration, moving, or shipping.
     
     
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                   TROUBLESHOOTING
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     
     This section lists procedures to resolve any problem you may encounter 
     with the Caviar drive.
     
     o   Re-read the installation instructions provided in this manual to be 
         sure that you followed the instructions correctly and included all 
         hardware necessary.
     
     o   Refer to your system documentation to be sure that you followed the 
         set up procedures correctly.
     
     o   Make sure that you formatted and partitioned the intelligent drive and 
         any additional drive with the DOS fdisk and format commands (or 
         equivalent utilities).  Refer to your operating system documentation 
         to check these procedures.
     
     o   Check the physical installation of your system.  Check the following:
         
         -    Are the jumper selections on the drive correct for your 
              installation?
         
         -    Are the cables correctly connected to all components?
         
         -    Check the adapter card, if it is installed.  Is it properly 
              seated, connected, and configured?
         
         -    Is the system power supply working correctly?  Is the power 
              properly connected to your system?
         
         -    Is there another controller?  Another 16-bit (AT) hard disk 
              controller cannot be used in the same system as the Caviar drive.
         
     If you have further questions or trouble, contact Western Digital 
     Technical Support at (800) 832-4778.
     
     
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                      REFERENCE
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     
     This section contains the physical, and environmental specification and 
     requirements for the Caviar intelligent disk.
     
     ===========================================================================
     PHYSICAL SPECIFICATIONS
     ===========================================================================
     
     GENERAL:                    40 MBytes               80 MBytes
     Formatted Capacity          42.7 MBytes             85.3 MBytes
     Interface                   40-pin PC/AT            40-pin PC/AT
     Actuator Type               Rotary Voice Coil       Rotary Voice Coil
     Number of Disks             1                       2
     Data Surfaces               2                       4
     Number of Heads             2                       4
     Number of Cylinders         1082                    1082
     Average Track Density       1,405 TPI               1,405 TPI
     Formatted Cylinder Capacity 39,424 bytes            78,848 bytes
     Bytes per Sector            512                     512
     Users Sectors per Drive*    83,314                  166,628
     Users Sectors per Cylinder  (2x39)-1=77             (4x39)-2=154
     Physical Sectors per Track  39                      39
     Servo Type                  Embedded Sector Servo   Embedded Sector Servo
     Recording Method            2,7 RLL                 2,7 RLL
     Recording Density           31,591 BPI              31,591 BPI
     Flux Density                21,061 FCI              21,061 FCI
     ECC                         56-bit                  56-bit
     Head Park                   Automatic Head Parking  Automatic Head Parking
     
     Suggested Logical Parameters:
        80 MB: Cyl 980       Hds 10        Spt 17
        40 MB: Cyl 980       Hds  5        Spt 17
     
     *  For 80 MByte drives, do not exceed the maximum sector capacity (166,628 
     sectors) when specifying the number of cylinders, heads and sectors per 
     track.  The maximum number of sectors on the 40 MByte drive is 83,314.
     
     FORM FACTOR:
        Form Factor                        3.5 inches
        Height                             1.00 inches, +/-.010
        Length                             5.75 inches, +/-.010
        Width                              4.00 inches, +/-.010
        Weight                             1.12 pounds (0.508 Kg)
     
     
     PERFORMANCE SPECIFICATIONS:
        Average Seek Time                  Sub-18 Milliseconds
        Track to Track Seek                6 Milliseconds
        Maximum Seek                       28 Milliseconds
        Index Pulse Period                 16.67 Milliseconds (+/-0.1%)
        Average Latency                    8.34 Milliseconds (+/-0.1%)
        Rotational Speed                   3595 Revolutions/min (+/-0.1%)
        Controller Overhead                0.3 Milliseconds average
        Data Trf Rate: Buffer to Disk      12 Mbits/second
                       Buffer to Host      4.5 MBytes/second
        Interleave                         1:1
        Buffer Size                        32K RAM
        Spindle Start Time                 5 seconds
        Spindle Stop Time                  6 seconds
        Start/Stop Cycles                  10,000 cycles minimum
        Acoustics                          Idle at 1 meter  40 dBA
                                           Seeking at 1 meter  45 dBA
     
     
     ===========================================================================
     POWER REQUIREMENTS
     ===========================================================================
     
     12 VDC AND 5VDC TYPICAL CURRENT DRAW:
     
     Operation          Input Voltage                          Power
                        12 VDC+/-5%         5VDC+/-5%      
     Read/Write         0.295A              0.184A             4.47W
     
     Seek               0.373A              0.180A             5.38W
     (1/3 stroke)
     
     Spin up            1.08A               0.185A            13.89W
                        1.40A max           0.25A max
     
     RIPPLE
     Ripple             Maximum             Frequency
     12 VDC             200 mV              0-20 MHz
                        (peak-to-peak)
      5 VDC             100 mV              0-20 MHz
                        (peak-to-peak)
     
     NOTE:  Spin mode begins at zero RPM spindle speed and ends with normal 
     speed.  A complete spin operation typically requires five seconds.
     
     POWER CONNECTORS AND CABLES:
     Power Connector                       4 Pin MOLEX (P/N 15-24-4041 or
                                           equivalent).
                                           3 Pin MOLEX (P/N 39-27-0032 or
                                           equivalent).  Factory installed 
                                           option.
     Mating Connector                      Body (AMP 1-480424-0 or equivalent).
                                           Pins (AMP 60619-4 or equivalent).
     Power Cable Wire Gauge                18 AWG
     
     
     ===========================================================================
     ENVIRONMENTAL CHARACTERISTICS
     ===========================================================================
     
     SHOCK AND VIBRATION:
     Shock           operating              10Gs
                     non-operating          75Gs
     Vibration       operating              5-500 Hz, sine sweep, 0.50 G,0-peak
                     non-operating          20-500 Hz, sine sweep, 4.0 G,0-peak
     Sweep Rate      One half octave/minute
     
     TEMPERATURE AND HUMIDITY:
     Temperature     operating              5C to 50C(41F to 90F)
                                            10C/hour Thermal Gradient
                     non-operating          -40C to 60C(-40F to 140F)
                                            20C/hour Thermal Gradient
     Relative 
     Humidity        Operating              8% to 80% RH non-condensing
                     Maximum Wet Bulb       26C(79F)
                     Non-operating          5% to 95% RH non-condensing
                     Maximum Wet Bulb       26C(115F)
     
     ATMOSPHERIC PRESSURE:
     Altitude        operating              -1000 to 10,000 feet
                     non-operating          -1000 to 40,000 feet
     
     NOTE:  The system environment must allow sufficient air flow to maintain 
     the air temperature adjacent to the casting at or below 50C.
     
     ===========================================================================
     RELIABILITY
     ===========================================================================
     
     MTBF                                  50,000 Power-on hours
     MTTR                                  10 minutes typical
     Component Design Life                 5 years
     Error Rate                 
        Soft Error                         <1 in 10000000000 bits read
        Hard Error                         <1 in 1000000000000 bits read
     Warranty Period                       One Year
     
     * Specifications subject to change without notice.
     
     
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                   LIMITED WARRANTY
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     
     WESTERN DIGITAL CORPORATION (WDC) expressly warrants, in accordance with 
     the terms described below, that it will either repair or replace this WDC 
     peripheral Product if it proves to be defective in design, material, or 
     workmanship in the course of its normal use, within one (1) year from the 
     Buyer's date of purchase from an authorized WDC dealer.
     
     For warranty repair or replacement, the defective Product must be returned 
     within one (1) year to an authorized WDC service center, either in person 
     or by insured mail, packaged in the original container and accompanied by 
     proof of purchase.  A repaired or replacement Product shall be warranted 
     as above for the balance of the original product Warranty Period or thirty 
     (30) days, whichever is longest.
     
     The normal intended use of the Product is as computer peripheral equipment 
     in accordance with the functional, environmental and operational standards 
     published by WDC or generally accepted in the industry.  WDC shall have no 
     obligation with respect to lost data or data contained in any Product 
     placed in its possession.
     
     WDC's liability to Buyer or anyone claiming through or on behalf of Buyer 
     with respect to claim or loss arising out of this transaction or alleged 
     to have resulted from an act or omission of WDC shall in no event exceed 
     the purchase price of the Product with respect to which such liability is 
     claimed.  In no event shall WDC be liable for consequential damages, 
     losses, or expenses arising out of this transaction.  The return of the 
     purchase price or the repair or replacement of the product shall be the 
     buyer's sole remedy hereunder.  All claims hereunder must be presented to 
     WDC within ninety (90) days following discovery of an alleged defect in 
     the Product.
     
     This limited warranty is WDC's sole warranty.  WDC makes no other warranty 
     of any kind whatsoever, express or implied.  All implied warranties of 
     merchantability and/or fitness for a particular purpose are hereby 
     disclaimed by WDC.
     
     In the United States, some states do not allow exclusion or limitation of 
     incidental or consequential damages, so the limitations above may not 
     apply to you.  This warranty gives you specific legal rights, and you may 
     also have other rights which vary from state to state.
