03-05-2012 10:55 AM
Short version: Installed Windows 8 on the mSATA (with Windows 7 on the main SSD). When I boot to the mSATA, Windows 8 opens/works fine. When I shut down then power up again, I cannot get into any BIOS setup screens to reset the boot order...it just keeps booting to Windows 8. I need to pull the mSATA drive to boot to Win7.
Long version: Added a Kingston mSATA to install Windows 8. Pulled the Intel SSD to do the install and everything went fine. Put the SSD back in. If I boot to Windows 7 and then shut down, when I power back up I can use the ThinkVantage button to get into the BIOS setup, or the f12 key to get to the boot order screen. But, if I change the boot order to get the machine to boot to Windows 8 on the mSATA, then do 'Power - Shut down' from Windows 8, when I power up again, neither the ThinkVantage or the f12 key do anything, and the machine boots to the mSATA.
When I power up after being in Win7, the black 'Thinkpad' screen includes the line under the Thinkpad logo that says "To interrupt normal setup...Push the blue ThinkVantage button." But when I boot up after being in Windows 8 on the mSATA, the black Thinkpad screen does not include that line.
I have BIOS version 8AET56WW (1.36). I have installed the UltraNav driver on Windows 8.
Any suggestions appreciated...pulling the mSATA drive each time is not fun.
03-05-2012 01:24 PM
Silly me...should have thought of this simple workaround:
Set the SSD (with Windows 7) ahead of the mSATA (Windows 8) in the boot order so it always defaults to the SSD, even after a shutdown from Windows 8. Doing that makes f12 available to select a boot drive every time the T520 powers up. (It also enables the ThinkVantage button to open the BIOS setup. If f12 is not working on your machine, change the setting in the BIOS.) That solved the booting issue.
But, every time I boot to the mSATA, then shut down and boot to the SSD, CHKDSK runs. So, I changed the BootExecute setting in the registry to disable autocheck of the C drive.