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12.510 bytes |
Service Hints & Tips |
Document ID: RMIE-3D7HF5 |
TP 365X/XD,560,755,760 - 2.1GB undetected data modification on last cylinder
Applicable to: World-Wide
Abstract :
755 & 760 2.1GB Undetected Data Modification on last Cylinder
Text :
DATA INTEGRITY NOTICE
The following IBM ThinkPad systems containing fixed disks, with a total number of cylinders that = 1024 * 2 to any power, can experience data loss. The area of possible data loss is limited to the first 8 Kilo bytes of data in the last cylinder. The data loss can only occur during the start of hibernation when the hibernation data over writes this area of the drive. A BIOS update has been released to correct this.
Normally the drive must be full to have data in this area of the fixed disk, but if the disk's data is fragmented (Many blank areas between data) a drive that appears to have space could have data in the last cylinder. The empty space, in this case, is located throughout the disk and not at the end.
Although the ThinkPad 2.1GB drive, FRU P/N 82H8489, is the only IBM drive that can be affected today, the BIOS update should be applied to all systems.
CHART 1 contains drive geometries (# of cylinders) affected.
CHART 2 contains ThinkPad Device types and Models that require the fix.
To determine if another equipment manufacturer's drive could be affected use the formula as these examples and CHART 1 shows.
example
1024 * 2 to 0 power = 1024
1024 * 2 to the 1st power = 2048
CHART 1
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Power |
0 |
1 |
2 |
3 |
4 | |
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Drives containing these number of cylinders are affected |
1024 |
2048 |
4096 |
8192 |
16384 |
etc. |
CHART 2
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Device Type |
Models |
Requiring |
the fix | |||
|
9545 |
755CD |
755CE |
755CSE |
755CV |
755CDV |
755CX |
|
9546 |
760C |
760CD |
760E |
760ED | ||
|
9547 |
760L |
760LD |
760EL |
760ELD | ||
|
2640 |
All models | |||||
|
2625 |
365X |
365XD |
Do not use the Hibernation function until the BIOS fix is active on the above systems in CHART 2. To prevent the hibernation function from activating before the BIOS fix is loaded, disable hibernation as follows:
365X & XD Instructions : Select ThinkPad FEATURES, click on the BATTERY icon. At the next prompt click on the SUSPEND/HIBERNATION/RESUME OPTION Icon then click on the ENABLE HIBERNATION button. The button will then be labelled DISABLE HIBERNATION. Select OK at the next screen. When the BIOS fix is loaded, reactivate HIBERNATION by following the same above steps.
560 Instructions : Select ThinkPad FEATURES, click on the BATTERY icon. At the next prompt click on the SUSPEND/HIBERNATION/RESUME OPTION Icon then click on the ENABLE HIBERNATION button. The button will then be labelled DISABLE HIBERNATION. Select OK at the next screen. When the BIOS fix is loaded, reactivate HIBERNATION by following the same above steps.
755 Instructions: Select the ThinkPad FEATURES, at the POWER setting (next prompt) select MORE and then select DISABLE HIBERNATION and save the new settings. The system will not be able to HIBERNATE. When the BIOS fix is loaded follow the same above steps to reactivate the Hibernation function. Click "Enable" then click on "OK". At the next screen click on "OK" again.
760 instructions: Select the ThinkPad FEATURES, click the Battery Icon, then click the Fixed Disk Icon and click on "OK". The system will not be able to HIBERNATE. When the BIOS fix is loaded follow the same above steps to reactivate the
Hibernation function. Click "Enable" then click on "OK". At the next screen click on "OK" again.
NOTE: The system's SUSPEND works correctly and will not cause this condition.
The following BIOS updates correct this condition.
SYTPE144
IBM ThinkPad 755CD/755CE/755CSE/755CV/755CDV/755CX
System Program Service Diskette Version 1.44 (BIOS 11/07/96) or later.
To obtain a copy of this Diskette, DoubleClick here :- 
SYTPG201
IBM ThinkPad 760E/760ED/760EL/760ELD with SVGA LCD. 800 x 600
System Program Service Diskette Version 2.01 (BIOS 10/3/97) or later.
To obtain a copy of this Diskette, DoubleClick here :-
SYTPF124
IBM ThinkPad 760C/760CD/760L/760LD
System Program Service Diskette Version 1.24 (BIOS 12/5/96) or later.
To obtain a copy of this Diskette, DoubleClick here :-
SYTPH201
IBM ThinkPad 760E/760ED/760XD/765 with XGA LCD. 1024 x 768
System Program Service Diskette Version 2.01 (BIOS 10/06/97) or later.
To obtain a copy of this Diskette, DoubleClick here :-
SYTPK110
IBM ThinkPad 560 model systems (NOT for the 560E)
System Program Service Diskette Version 1.10 (BIOS 10/29/97) or later
To obtain a copy of this Diskette, DoubleClick here :-
SYTPI102
IBM ThinkPad 560E model systems only
System Program Service Diskette Version 1.02 (BIOS 10/03/97) or later
To obtain a copy of this Diskette, DoubleClick here :-
SYTPX110
IBM ThinkPad 365X and 365XD model systems
System Program Service Diskette 1.05 (BIOS 01/30/97) or later
To obtain a copy of this Diskette, DoubleClick here : -
There are both DOC and EXE files with the above names. Check the model of the system requiring the BIOS update to determine which file to download. Download both the DOC and EXE file. Read the DOC file using an editor program. It contains detailed information about the fixes on the BIOS diskette, information pertaining to the ThinkPads operating system, and installation instructions.
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Search Keywords |
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Hint Category |
Hard Drives | |
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Date Created |
10-01-97 | |
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Last Updated |
13-11-98 | |
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Revision Date |
10-11-99 | |
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Brand |
IBM ThinkPad | |
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Product Family |
ThinkPad 365X/XD, ThinkPad 560, ThinkPad 560E, ThinkPad 755CE/CSE, ThinkPad 755CX, ThinkPad 755CV, ThinkPad 755CD, ThinkPad 755CDV, ThinkPad 760C, ThinkPad 760E, ThinkPad 760CD, ThinkPad 760L/LD, ThinkPad 760ED, ThinkPad 760XD, ThinkPad 760EL/ELD, ThinkPad 760XL, ThinkPad 765L, ThinkPad 765D | |
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Machine Type |
2625, 2640, 9545, 9546, 9547 | |
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Model |
Various | |
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TypeModel |
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Retain Tip (if applicable) |
H136020 | |
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Reverse Doclinks |