zfs discuss - Nov 2009 - Quick drive slicing madness question

If I have a machine with two drives, could I create equal size slices
on the two disks, set them up as boot pool (mirror) and then use the
remaining space as a striped pool for other more wasteful
applications?

Mauricio Tavares wrote:
> If I have a machine with two drives, could I create equal size slices
> on the two disks, set them up as boot pool (mirror) and then use the
> remaining space as a striped pool for other more wasteful
> applications?
You could but why bother ?  Why not just create one mirrored pool.

Having two pools on the same disk (or mirroring to the same disk) is 
asking for performance pain if both are being written to heavily.

-- 
Darren J Moffat

Darren J Moffat <darrenm at opensolaris.org> writes:
> Mauricio Tavares wrote:
>> If I have a machine with two drives, could I create equal size slices
>> on the two disks, set them up as boot pool (mirror) and then use the
>> remaining space as a striped pool for other more wasteful
>> applications?
>
> You could but why bother ?  Why not just create one mirrored pool.
you get half the space available...  even if you don''t forego
redundancy
and use mirroring on both slices, you can''t extend the data pool later.
> Having two pools on the same disk (or mirroring to the same disk) is
> asking for performance pain if both are being written to heavily.
not too common with heavy writing to rpool, is it?  the main source of
writing is syslog, I guess.

-- 
Kjetil T. Homme
Redpill Linpro AS - Changing the game