On 08/10/10 06:21 PM, Terry Hull wrote:
I am wanting to build a server with 16 - 1TB drives with 2 – 8 drive
RAID Z2 arrays striped together. However, I would like the capability
of adding additional stripes of 2TB drives in the future. Will this be
a problem? I thought I read it is best to keep the stripes the same
width and was planning to do that, but I was wondering about using
drives of different sizes. These drives would all be in a single pool.
It would work, but you run the risk of the smaller drives becoming full
and all new writes doing to the bigger vdev. So while usable,
performance would suffer.
One option would be to add 2TB drives as 5 drive raidz3 vdevs. That way
your vdevs would be approximately the same size and you would have the
optimum redundancy for the 2TB drives.
--
Ian.
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