Raman Gupta wrote:
However, note that I can make the "exception Emask 0x0 SAct 0x0 SErr
0x0 action 0x6 frozen" happen even with the RAID array stopped and no
filesystems mounted. All I have to do is run the smartctl -a /dev/sdd
command (sdd is attached to the Marvell controller) repeatedly until
this exception occurs:
Dec 27 18:59:30 x kernel: ata6.00: exception Emask 0x0 SAct 0x0 SErr
0x0 action 0x6 frozen
Dec 27 18:59:30 x kernel: ata6.00: cmd
ec/00:01:00:00:00/00:00:00:00:00/00 tag 0 pio 512 in
Dec 27 18:59:30 x kernel: res
40/00:00:00:4f:c2/00:00:00:00:00/40 Emask 0x4 (timeout)
Dec 27 18:59:30 x kernel: ata6.00: status: { DRDY }
Dec 27 18:59:30 x kernel: ata6: hard resetting link
Dec 27 18:59:30 x kernel: ata6: SATA link up 3.0 Gbps (SStatus 123
SControl 300)
Dec 27 18:59:30 x kernel: ata6.00: configured for UDMA/133
Dec 27 18:59:30 x kernel: ata6: EH complete
Usually 10-15 executions is sufficient to replicate the issue.
Hmm. I wonder what running this script from this bug:
http://bugzilla.kernel.org/show_bug.cgi?id=14831
against drives attached to other controllers would do? It doesn't do
anything particularly special - just runs smartctl in a loop while also
writing to the same drive (via fs using dd).
Out of interest have you tried drives from other manufacturers? Would
also be interested to see what happens if you run the script against the
same drive, but attached to the ICH7?
Cheers,
Tim.
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