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There is a chance that the 750 is setting your drive to Slave mode through the set of pins on the end of the drive connector (those closest to the end of the group of 4 separated from the rest of the pins). If you have a manual for the drive, compare the pin configurations with those of the IBM drives. You can find some IBM drive info at: http://www.storage.ibm.com/techsup/hddtech/dhaa/dhaajum.htm If they are incompatible, you may have to take steps to "open" the connection between those two last pins. I have read here that some people have done it with tape on the IBM carrier connector. Others have cut pins or solder paths on their drives. For any of this, you better be pretty sure about what you are doing first. Learn more about it and then...good luck. Disclaimer...These are probably uninformed opinions and you should not believe them or act on them in any way until you find out for yourself! :-|)> Thanks Mike Redmond =================== At 10:28 PM 10/30/96 +0000, you wrote: >Hello out there.. > >I'm trying to upgrade the HD on my Thinkpad 750 with a third party >device (a Hitachi DK212A-81 810MB). I've upgraded the BIOS on the >machine but it just cannot see the drive. Do I need to do anything >clever with jumpers etc.. Yes, I know I've seen lots of reports that it >should work, but maybe there's something quirky about this particular >drive? I know the drive works 'cos I've tested it in a desktop machine. > >Thanks in advance, >Martin. > >