On Thu, Jan 22, 2015 at 10:47 AM, Kim Culhan <[email protected]> wrote:

>
> What method did you use to locate the bad device ?
>

I did a:   iostat -xnc 1  in the global zone.  I then went into the Centos
KVM in a separate terminal and did a "dd" write to the NFS volume in
question.  Watching the global zone terminal iostate output, I monitored
what the %b (% busy) output was for each drive.  One of the spindle drives
was maxed at 100%.  Sigxcpu (IRC username) suggested that this was the bad
drive and I should try detaching it (This was one drive in a mirrored
vdev).  I then did a zpool detach zones <suspected bad device>.  I then
went back to my KVM termainal and re-initiated the dd write test.  iostate
in the global zone then showed even %b across all devices and my dd write
test in the KVM reported a really good write speed to the NFS volume.

Hope that helps.

Greg



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