===============================================================================
                             MAXTOR 7245A/AT IDE DRIVE
===============================================================================

KEY FEATURES:

  * 15ms average seek               * 64K on-board cache  
  * Low power consumption           * Zone density recording 
  * 1:1 interleave                  * Dual drive master/slave support 
  * Rotary voice coil               * Automatic actuator lock 
  * Single-sided surface mount PCBA

SPECIFICATIONS:

Formatted: ................................. 245,583,872 Bytes
Embedded Controller: ....................... AT 
Actuator type: ............................. Voice Coil
Number of Disks: ........................... 2
Data Surfaces: ............................. 4
Data Heads: ................................ 4
Servo: ..................................... Embedded
Tracks per surface: ........................ 1,944
Track Density (average): ................... 2,340 tpi
Bytes per Block: ........................... 512
Sectors per track (5 Zones): ............... 48-72

PERFORMANCE (Average):

Seek times* (ms)
     Track to track: ....................... 3
     Average: .............................. 15 **
     Maximum: .............................. 27

Average latency (ms) ....................... 8.45
Rotation speed ............................. 3,551 RPM
Controller overhead ........................ 1 ms

Data transfer rate (Mbytes per sec)
     To/from media ......................... 2.83
     To/from buffer (AT) ................... 9.0
Start time / power up (0-3,551 RPM)
     Typical ............................... 6 sec
Stop time / power down
     Typical ............................... 3 sec
Start/stop cycles .......................... 40,000 average
Interleave: ................................ 1:1
Buffer Size: ............................... 64K
Interface: ................................. AT 
Recording Method: .......................... 1,7 RLL
Recording Density (Kbpi) ................... 42.6 maximum
Flux Density (Kfci) ........................ 31.9 maximum

POWER REQUIRMENTS (Average):

    Mode     +12VDC 8%   +5VDC 5%   Power/Duration
    Spin Up   820mA        330mA      <10ms
    R/W       135mA        325mA      3.25 W
    Idle      135mA        315mA      3.15 W

PHYSICAL:

    Height:  1.00"  (2.54 cm)
    Length:  5.75"  (14.61 cm)
    Width:   4.00"  (10.16 cm)
    Weight:  1.2 lbs. (.57 kg)

ENVIRONMENTAL:

Temperature
    Operating .............................. 5C to 50C
    Non-operating .......................... Low temperature (-40C) per
                                             MIL-STD-810E, Method 502.3
                                             High temperature per 
                                             MIL-STD-810E, Method 501.3 
                                             Hot induced conditions.
    Thermal gradient ....................... 20C per hour max
Humidity 
  Operating .............................. Per MIL-STD-810E, Method 507.3
                                           Procedure I, Natural Cycle 3
  Non-operating & storage ................ Per MIL-STD-810E, Method 507.3
                                           Procedure IIb, Induced cycle 5
Altitude (relative to sea level)
  Operating .............................. -200 to 10,000 feet
  Non-operating .......................... Per MIL-STD-810E, Method 500.3
                                           Low pressure (Altitude) procedure I,
                                           Storage, test condition 2
RELIABILITY & MAINTENANCE

MTBF ....................................... >150,000 POH (Power On Hours) *1
AFR ........................................ 1.7% (Annualized Failure Rate)*2
Component design life ...................... 5 years (minimum) *3
Quality Acceptance Rate .................... 99.8% (2,000DPPM) *4
Preventive Maintenance ..................... None
Data reliability ........................... <10 per 10 to the 13th bits read
                                             (hard read errors)
Shock & Vibration (average)
  Shock measured a half-sine pulse. Vibration
  measured at swept sine, 1 octave per minute.

  Non-operating shock .................... 70 Gs, 11 ms
  Operating shock ........................ 15 Gs, 11 ms 
                                           (w/o non-recoverable errors)
  Non-operating vibration
      Per MIL-STD-810E, Method 514.4, Basic transportation vertical axis
      PSD profile, 10-500 Hz, 60 Min/Axis.
  Operating, ramdom vibration
      5 - 20 Hz  ......................... 0.049" (double amplitude)
      20 - 300 Hz ........................ 1.5G Peak amplitude

Acoustic Noise (typical)
      Sound power ......................... 3.9 belA (per ISO 7779)
      Sound pressure ...................... 33 dBA 

     *   At nominal DC input voltages. 
     **  The average of 10,000 random seek times (measured on independent.
         test equipment) constitutes the average seek time specification.
     *1  Annualized average applicable only to the time period after
         installation to the end of the specified Component Design Life.
         assumed POH/year is 2,000 hours.
     *2  Annualized average applicable only to the time period after final
         installation to the end of the specified Component Design Life.
     *3  The period of the before identified wear-out mechanisms will impact
         the annual failure rate.
     *4  Average defects per million rate is measured by our customers 
         through their final installation. Based on failures that are 
         verified as chargeable to Maxtor.
     *5  Maxtor defines a megabyte as 1,000,000.

==============================================================================

                       7245A JUMPER DESIGNATION
                                             J23J22J20J16
       Ĵ
        SYNC Spindle Control                            
         Sync Spindle Disabled*              O          
         Sync Spindle Enabled                J          
         Sync Slave*                            O       
         Sync Master                            J       
       Ĵ
        Master/Slave                                    
         Only drive in single drive system*        J    
         Master in dual drive system               J    
         Slave in dual drive system                O    
       Ĵ
        I/O Channel Ready                               
         Enabled                                      J 
         Disabled*                                    O 
       
         J=Jumpered O=Open *=Default

Ŀ  Ŀ     Ŀ  Ŀ     Ŀ  Ŀ
                                                 ÿ
                                                            Ŀ       
               >::::          
        ͻ                                            
             J24 J22                                            Ŀ     
          Ŀ                                            ,,     
           * * * *               >::     
           * * * *       ͻ                     ::  J1 
                    Ŀ                              
           J25 J23          J20                                    
        ͼ        * * J19                               
                              J18 * *                                  
                                  * * J17                               
                              J16 * *                                   
                                                               
                             ͼ                          
                                                                     1     
                                                                      2     
                                                                      3  J3 
    Ŀ                 Ŀ   Ŀ                Ŀ  Ŀ   4     
               

                            CMOS Configuration:     

                    Cyls  Hds  Write  Landing Sec/Trk
                               PreComp  Zone
                    ---------------------------------
                    967   16     0       0       31

            Yields: 245.6 Million Bytes (Approx. 234 MegaBytes)

            Drive is low-level formatted  with a 1:1 interleave at 
            the factory, with any defects retired to a dedicated 
            non-destructive zone.
            Jumpers J17, J18, J24, & J25 factory reserved. Abnormal 
            operation may occur if reserved jumpers are altered.
            Jumper J19 may be used to store the spare shunt if 
            drive is configured for slave mode.
            
        7245A and 7245S are registered trademarks of Maxtor Corporation.
               AT is a registered trademark of IBM Corporation.
               Specifications subject to change without notice.
                      Copyright 1993 Maxtor Corporation.
==============================================================================
