H136020.TXT 755, 760, 560, & 365X XD 2.1GB UNDETECTED DATA MODIFICATIONN. 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/N82H8489, is the only IBM drive that can be affected today, the BIOS update should be applied to all systems. CHART INFORMATION _________________ 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 ________________________________________________________________ |Power | 0 | 1 | 2 | 3 | 4 | | |------------------+-------+-------+------+------+-------+-----| |Drives containing | | | | | | | |these numbers of | | | | | | | |cylinders are | 1024 | 2048 | 4096 | 8192 | 16384 | etc.| |affected. | | | | | | | |--------------------------------------------------------------| =============================================================== CHART 2 __________________________________________________________ | DEVICE | MODELS REQUIRING THE FIX | | TYPE | | |--------+-----------------------------------------------| | 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: 356X & 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 labeled 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 labeled 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. They are located on the IBM PCCO BBS and can be downloaded via modem using the telephone numbers or Internet URL listed under heading labeled "IMPORTANT" at the end of this tip. FILE NAMES ON THE BBS: SYTPE144 IBM ThinkPad 755CD/755CE/755CSE/755CV/755CDV/755CX System Program Service Diskette Version 1.44 (BIOS 11/07/96) or later. SYTPG105 IBM ThinkPad 760E/760ED/760EL/760ELD with SVGA LCD. 800 x 600 System Program Service Diskette Version 1.05 (BIOS 12/11/96) or later. SYTPF124 IBM ThinkPad 760C/760CD/760L/760LD System Program Service Diskette Version 1.24 (BIOS 11/08/96) or later. SYTPH101 IBM ThinkPad 760E/760ED with XGA LCD. 1024 x 768 System Program Service Diskette Version 1.01 (BIOS 12/11/96) or later. SYTPK104 IBM ThinkPad 560 model systems. System Program Service Diskette Version 1.04 (BIOS 02/05/97) or later. SY36X105 IBM ThinkPad 365X and 365XD model systems System Program Service Diskette Version 1.05 (BIOS 01/30/97) or later. 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. ______________________ IMPORTANT________________________________ | | | Diskette fixes are customer installable. Customers should | | be advised to contact the IBM PC Company HelpCenter at | | 800-772-2227 if assistance is required in getting or | | installing this information. | | Files are located on the PC company's Bulletin Board Service| | (BBS). The direct line for modem connection to The PC | | Company BBS is 1-919-517-0001 or tieline 255-0001. | | | | Customers in Canada should call IBM's HelpPC at 800-565-3344| | for Assistance or down load information. The Canadian BBS | | phone numbers are: | | Montreal-514-938-3022, Toronto-905-316-4255, | | Winnipeg-204-934-2735, Vancouver-604-664-6464. | | | | The data may also be downloaded via the Internet from | | the IBM Personal Computer File Library by searching the | | following Internet URL: http://www.pc.ibm.com/files.html | --------------------------------------------------------------