On Dec 13, 2009, at 11:28 PM, Yaverot wrote:
Been lurking for about a week and a half and this is my first post...
--- bfrie...@simple.dallas.tx.us wrote:
On Fri, 11 Dec 2009, Bob wrote:
Thanks. Any alternatives, other than using enterprise-level drives?
You can of course use normal consumer drives. Just don't expect them
to recover from an read error very quickly.
Any way to tell ZFS that these drives are of "lower quality" and
shouldn't be kicked out as faulted so quickly? I personally setup
my home server to use OpenSolaris so I could have ZFS safeguard my
data. I am willing to trade away performance for more stability,
and less "yes that drive is perfectly fine" type management.
FMA (not ZFS, directly) looks for a number of failures over a period
of time.
By default that is 10 failures in 10 minutes. If you have an error
that trips
on TLER, the best it can see is 2-3 failures in 10 minutes. The symptom
you will see is that when these long timeouts happen, they take a long
time
because, by default, the drive will be reset and the I/O retried after
60 seconds.
I'm also willing to have more redundancy and less storage with the
same number of drives, but that has to wait until I have enough
unused drives to setup a new pool with the new options (either
raidz3 or full mirroring) and copy over as there is no method to
make this change inplace.
This is a good idea anyway :-)
-- richard
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