Ben Waugh wrote:
> Then I start writing to these in parallel as follows:
> dd if=/dev/zero of=/mnt/data/temp1/testfile bs=1M &
> dd if=/dev/zero of=/mnt/data/temp2/testfile bs=1M
I don't know much about xfs, but I'd be interested to know whether the
problem only occurs when all the dd commands run at once? Also, does it
occur randomly, or only when specific file systems are written to? How
long into the test does it take before the problem occurs? Is the
problem precisely reproducible, or does it occur in different ways each
time? Can the problem be pinned down to one disk? Does it happen when
other file system formats are used? But all that testing would take
ages, so (for what it's worth) there is a similar pattern mentioned at
this link:
http://ask.adaptec.com/scripts/adaptec_tic.cfg/php.exe/enduser/std_adp.php?p_faqid=15357&p_created=1225366599
It would be useful to know the value of /sys/block/sdX/device/timeout on
your system. I expect it would be 60 seconds.
Sorry I can't be more help,
Steve
--
Steve Jones [log in to unmask]
System Administrator office: 220
High Energy Physics Division tel (int): 42334
Oliver Lodge Laboratory tel (ext): +44 (0)151 794 2334
University of Liverpool http://www.liv.ac.uk/physics/hep/
--
Steve Jones [log in to unmask]
System Administrator office: 220
High Energy Physics Division tel (int): 42334
Oliver Lodge Laboratory tel (ext): +44 (0)151 794 2334
University of Liverpool http://www.liv.ac.uk/physics/hep/
|