I'm sorry to say that I have experienced problems very similar to
those of Jim Ramsay and others with a recent Linux 2.6 kernel (2.6.12)
and a Promise SATA controller (PDC20318 (SATA150 TX4) though, not the
SATAII one), and a raid5 atop that. Disks are Hitachi Deskstar 160MB
SATA.
Logged error messages similar to those reported by Jim Ramsay, and
also by Joerg Sommrey on linux-kernel, including several occasions of
messages like:
ata4: status=0x51 { DriveReady SeekComplete Error }
ata4: error=0x40 { UncorrectableError }
(... the two lines above repeated multiple times ...)
scsi5: ERROR on channel 0, id 0, lun 0,
CDB: Read (10) 00 08 38 46 2d 00 00 c8 00
Current sd08:57: sense key Medium Error
Additional sense indicates Unrecovered read error -
auto reallocate failed
I/O error: dev 08:57, sector 49773056
After a while, two disks got kicked out of the raid (with several
hours in between, though), the second time leading to a crashed raid
and serious file system corruption. :(
The hardware appears quite healthy; stressing the disks (and
controller) hard with a recent 2.6.12 kernel gives loads of error
messages, but repeating the test with a 2.6.10 kernel doesn't show any
problems at all.
Thus, it appears that some serious bug has crept into the Promise
driver (or possibly other parts of libata), between 2.6.10 and 2.6.12.
Thorild Selén
Datorföreningen Update / Update Computer Club, Uppsala, SE
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