On Sat, Apr 18, 2009 at 6:19 AM, Gordon McLellan gordonthree@gmail.com wrote: <snip>
I'm experiencing lots of kernel errors when reading or writing to a disk that is part of an mdadm softraid-5 array. Since originally detecting this problem, I have isolated it to one disk, but I'm not sure what the cause of the error is. I have torn down the array and have been testing the actual device now.
I tested the drive several times using smartctl and the tests came back OK / PASSED each time, and no kernel errors were logged.
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Apr 18 01:10:00 xenmaster kernel: BUG: warning at drivers/ata/libata-core.c:4923/ata_qc_issue() (Tainted: G )
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What do those BUG warnings mean? (Tainted: G) Those appear various times, in the messages you posted. That driver has a problem?