Steve Bertrand wrote:
Matthew Dillon wrote:
If you are getting DMA timeouts, go to this URL:
http://wiki.freebsd.org/JeremyChadwick/ATA_issues_and_troubleshooting
Then I would suggest going into /usr/src/sys/dev/ata (I think, on
FreeBSD), locate all instances where request->timeout is set to 5,
and change them all to 10.
cd /usr/src/sys/dev/ata
fgrep 'request->timeout' *.c
... change all assignments of 5 to 10 ...
Changing 5 to 10 in all cases and rebuilding the kernel does not fix the
problem.
Went from 10->15, and it took quite a bit longer into the backup before
the problem cropped back up.
Here is what I was seeing at the time it failed. Where netstat and zpool
iostat drop off is where I start seeing the errors occur:
# top
last pid: 1069; load averages: 0.09, 0.17, 0.10
up 0+00:08:31 19:22:39
53 processes: 1 running, 52 sleeping
CPU states: 0.0% user, 0.0% nice, 0.0% system, 0.0% interrupt, 100%
idle
Mem: 28M Active, 3644K Inact, 301M Wired, 76K Cache, 1634M Free
Swap:
# netstat -w 1 -h
4.8K 0 11M 3.5K 0 5.4M 0
4.5K 0 10M 3.3K 0 5.1M 0
4.9K 0 11M 3.6K 0 5.5M 0
4.8K 0 11M 3.5K 0 5.4M 0
4.3K 0 9.5M 3.1K 0 4.8M 0
5.1K 0 11M 3.7K 0 5.7M 0
5.0K 0 11M 3.6K 0 5.6M 0
5.3K 0 12M 3.9K 0 6.0M 0
4.8K 0 11M 3.5K 0 5.4M 0
4.7K 0 10M 3.4K 0 5.2M 0
4.8K 0 11M 3.5K 0 5.4M 0
4.6K 0 10M 3.4K 0 5.2M 0
4.1K 0 9.1M 3.0K 0 4.6M 0
5.3K 0 12M 3.9K 0 6.0M 0
5.2K 0 12M 3.8K 0 5.8M 0
4.3K 0 9.5M 3.1K 0 4.8M 0
4.3K 0 9.6M 3.2K 0 4.9M 0
5.4K 0 12M 4.0K 0 6.1M 0
4.8K 0 11M 3.5K 0 5.4M 0
2.4K 0 5.1M 1.7K 0 2.5M 0
input (Total) output
packets errs bytes packets errs bytes colls
2 0 120 2 0 316 0
3 0 180 4 0 1.0K 0
3 0 180 2 0 316 0
3 0 180 3 0 658 0
5 0 1.6K 5 0 942 0
3 0 254 4 0 840 0
3 0 180 2 0 316 0
# zpool iostat 1
storage 6.40G 1.81T 0 296 0 37.0M
storage 6.43G 1.81T 0 188 0 14.5M
storage 6.43G 1.81T 0 0 0 0
storage 6.43G 1.81T 0 0 0 0
storage 6.43G 1.81T 0 0 0 0
storage 6.43G 1.81T 0 47 0 5.99M
storage 6.46G 1.81T 0 218 0 18.0M
storage 6.46G 1.81T 0 0 0 0
storage 6.46G 1.81T 0 0 0 0
storage 6.46G 1.81T 9 0 192K 0
storage 6.46G 1.81T 0 59 0 7.39M
storage 6.49G 1.81T 1 250 3.42K 14.9M
storage 6.49G 1.81T 0 0 0 0
storage 6.49G 1.81T 0 0 0 0
storage 6.49G 1.81T 0 0 0 0
storage 6.49G 1.81T 0 141 0 17.5M
storage 6.52G 1.81T 0 74 0 232K
storage 6.52G 1.81T 0 0 0 0
storage 6.52G 1.81T 0 0 0 0
storage 6.52G 1.81T 0 0 0 0
storage 6.52G 1.81T 0 151 0 18.8M
storage 6.52G 1.81T 0 114 0 8.07M
storage 6.52G 1.81T 0 0 0 0
storage 6.52G 1.81T 0 0 0 0
storage 6.52G 1.81T 0 0 0 0
storage 6.52G 1.81T 0 0 0 0
Don't know if this will help anyone or not.
Steve
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