On Fri, Sep 14, 2007 at 01:48:40PM -0500, Christopher Gibbs wrote:
I suspect it's probably not a good idea but I was wondering if someone
could clarify the details.
I have 4 250G SATA(150) disks and 1 250G PATA(133) disk. Would it
cause problems if I created a raidz1 pool across all 5
Dan Pritts wrote:
On Fri, Sep 14, 2007 at 01:48:40PM -0500, Christopher Gibbs wrote:
I suspect it's probably not a good idea but I was wondering if someone
could clarify the details.
I have 4 250G SATA(150) disks and 1 250G PATA(133) disk. Would it
cause problems if I created a raidz1
Great, that's the answer I was looking for.
My current emphasis is on storage rather than performance. So I just
wanted to make sure that mixing the two speeds would be just as safe
as using only one kind.
Thanks!
On 9/17/07, Eric Schrock [EMAIL PROTECTED] wrote:
Yes, the pool would run at the
I'm far from an expert but my understanding is that the zil is spread
across the whole pool by default so in theory the one drive could slow
everything down. I don't know what it would mean in this respect to keep
the PATA drive as a hot spare though.
-Tim
Christopher Gibbs wrote:
Anyone?
Yes performance will suffer, but it's a bit difficult to say by how much.
Both pool transaction group writes and zil writes are spread across
all devices. It depends on what applications you will run as to how much
use is made of the zil. Maybe you should experiment and see if performance
is good
Yes, the pool would run at the speed of the slowest drive. There is an
open RFE to better balance allocations acros variable latency toplevel
vdevs, but within a toplevel vdev there's not much we can do; we need to
make sure your data is on disk with sufficient replication before
returning
If your priorities were different, or for others pondering a similar question,
the PATA disk might be a hotspare.
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I suspect it's probably not a good idea but I was wondering if someone
could clarify the details.
I have 4 250G SATA(150) disks and 1 250G PATA(133) disk. Would it
cause problems if I created a raidz1 pool across all 5 drives?
I know the PATA drive is slower so would it slow the access across
