i had a small panic on Friday, when a venti+fossil fs (a supermicro
5015A-EHF-D525 box) had an unexplained reboot followed by what appeared to
be a disk problem. on inspection -- by IL booting it from an un-retired
kenfs -- i noticed that the sd controller position had changed from sdE0 to
sdC0.

suspecting the bios setup, i checked the sata settings in bios, and the
first controller was set to ata rather than ahci.

although i'm happy it wasn't a bad disk, it bugs me that i don't know how
the bios could have changed by itself. has anyone seen this before?

-Skip