My only question is is how long it takes to resilver... Supposedly the
entire array has to be checked which means 6x1.5tb. It has a quad core
CPU that's basically dedicated to it. Anyone have any estimates?
Sounds like it is a lot slower than a normal raid5 style rebuild. Is
there a way to tune it so it can rebuild/resilver faster?
On Mar 29, 2009, at 9:43 PM, "Monish Shah" <mon...@indranetworks.com>
wrote:
Hello David and Michael,
Well I might back up the more important stuff offsite. But in
theory it's all replaceable. Just would be a pain.
And what is the cost of the time to replace it versus the price of
a hard disk? Time ~ money.
This is true, but there is one counterpoint. If you do raidz2, you
are definitely paying for extra disk(s). If you stay with raidz1,
the cost of the time to recover the data would be incurred if and
only if he has a failure in raidz1 followed by a second failure
during the re-build process. So, the statistically correct thing to
do is to multiply the cost of recovery by the probability and see if
that exceeds the cost of the new drives.
To be really accurate, the cost of raidz2 option should also include
the cost of moving the data from the existing raidz1 to the new
raidz2 and then re-formatting the raidz1 into raidz2.
However, all this calculating is probably not worthwhile. My
feeling is: it's just a home video server and Michael still has the
original media (I think). Raidz1 is good enough.
Monish
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