ata timeouts under load
000.fbsd at quip.cz
Mon Sep 14 15:57:45 UTC 2009
Mike Tancsa wrote:
> At 11:21 AM 9/14/2009, Miroslav Lachman wrote:
>> I have very similar problem with one disk in gmirror, but it is on 7.2
>> not current.
>> Sep 14 04:48:29 jimi kernel: ad6: timeout waiting to issue command
>> Sep 14 04:48:29 jimi kernel: ad6: error issuing FLUSHCACHE command
>> Sep 14 04:48:29 jimi kernel: ad6: TIMEOUT - READ_DMA48 retrying (1
>> retry left) LBA=447001516
>> Sep 14 04:48:29 jimi kernel: ad6: FAILURE - READ_DMA48
>> status=51<READY,DSC,ERROR> error=4<ABORTED> LBA=447001516
> Are you sure this is not just a bad cable ? I have had similar symptoms
> which was a result of a bad cable. If possible, swap the cable between
> the 2 disks and see if it follows the cable.
I know it can be caused by bad cables, but everytime I see it with bad
cables, it was without "timeout waiting to issue command" and "error
issuing FLUSHCACHE command". It was just "TIMEOUT - READ_DMA48..." and
similar messages (on different machines in the past).
The messages above is from server running for a year without problems,
but disk load is higher and filesystem space is more used then before.
More information about the freebsd-current