On 12/18/10 10:49 AM, Ian D wrote:
I have 159x 15K RPM SAS drives I want to build a ZFS appliance with.

75x 145G
60x 300G
24x 600G

The box has 4 CPUs, 256G of RAM, 14x 100G SLC SSDs for the cache and a mirrored 
pair of 4G DDRDrive X1s for the SLOG.

My plan is to mirror all these drives and keep some hot spares.

My question is:  should I create three pools (one for each size of drives) and 
share the cache and slog among them or should I create a single pool with them 
all?

The answer really depends on what you want to do with pool(s). You'll have to provide more information.

--
Ian.

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