[mythtv-users] Most Reliable FS. XFS maybe causing crash
jacob
jacob at heider.homelinux.net
Fri Sep 15 20:51:50 UTC 2006
On Fri, Sep 15, 2006 at 03:00:52PM -0500, Trey Boudreau wrote:
> On Fri, Sep 15, 2006 at 01:32:28PM -0600, Mark wrote:
> > On Friday 15 September 2006 13:29, Trey Boudreau wrote:
> > > On Fri, Sep 15, 2006 at 01:10:31PM -0600, Mark wrote:
> > > > I have about 700G on a SW RAID with XFS. I am seeing crashes and it may
> > > > be due to XFS oopsing the kernel.
> > >
> > > I, too, thought I had problems with XFS oopsing the kernel. It turns
> > > out I had a bad NIC (integrated on the motherboard, unfortunately), that
> > > failed only under heavy load.
> >
> > How did you get the info to determine that it was the NIC? I would love to be
> > able to pin this down rather than stabbing away at things.
> >
> You have to think of ways to exercise the various components.
>
> For the disk, you can try various IO benchmarks, or you can use dd to
> copy various large files around.
>
while [ 1 ]
do
for x in <insert disks here>
do
dd if=/dev/$x of=/dev/null
done
done
or, if you think multi-disk access patterns are the problem:
for x in <insert disks here>
do
dd if=/dev/$x of=/dev/null &
done
and repeat as necessary.
> For the NIC, you want send and/or receive data as quickly as possible.
> You'll also want to have some disk I/O in there in case bus contention
> comes into play. If you have a non-XFS partition on the SW RAID drive,
> you can scp a large file from it to another machine's /dev/null.
>
box 1:
nc -l -p 40000 >/dev/null
box 2:
cat /dev/zero | nc <box 1's IP> 40000
Jacob
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