Ultrabay HDD (Hard Drive) Disappears After a Few Minutes of Being On

Hi,
Windows 7
Thinkpad T400
Ultrabay HDD with SATA encrypted with Bitlocker
I plug my drive in, unlock it, use it, and go get a cup of coffee. A few moments later, the drive will no longer be in my computer. I looked through power manager to see if there was a setting turning the drive off, but cannot find any option.

Hi and welcome to the forum!
Did you buy the adapter from eBay?
Try following solution:- http://forum.lenovo.com/t5/T400-T500-and-newer-T-s​eries/T410-Ultrabay-HDD-Question-SOLVED/m-p/246774​...
Same solution also posted here
Follow the procedure and make a shortcut as the Dd16 suggests, when the Ultrabay HDD powers off double click the shortcut to activate it.
Hope this helps.
Maliha (I don't work for lenovo)
ThinkPads:- T400[Win 7], T60[Win 7], IBM 240[Win XP]
IdeaPad: U350
Apple:- Macbook Air [Snow Leopard]
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    Today, I replaced the Backup Battery, pushed the PMU, re-attached the AC, and Powered Up with the case open as per your suggestion.
    It was trying for a few minutes (the gray screen went black at one point, and then returned to gray) before presenting me with the flashing question mark.
    There was, however, a quiet but distinct "buzzing" sound that would alternate: 1 sec "buzz", one second silence, one second "buzz", one second silence, etc. coming from the drives, even after the "?" appeared.
    I powered down, removed the Ribbon and Power Cables from the new "Slave" drive, and powered up again, with the exact same results.
    I powered down, removed the Ribbon and Power cables from the original "Master" drive, reinstalled the Jumper on the New Drive as "Master", plugged the End of the Ribbon and the Power cables into the New "Master" drive and powered up. The screen went to the "?" within 20 seconds instead of 4+ minutes, and no more "buzzing".
    I put the Apple Hardware Tools Disk in, ran the "long" test, and everything came out fine.
    I have to abandon this for now, but thanks again for your previous advice, and any more you may have!
    Cheers,
    Patterson

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