zfs discuss - Jan 2008 - Drives of different size

Let''s say I have two 300 GB drives and one 500 GB drive. Can I put a
RAID-Z on the three drives and a separate partition on the last 200 GB
of the 500 GB drive?

- Marcus

I think you can if you create a slice on the larger drive that is equal to the
size of the smaller drives (so 300GB)

If you just add the whole large drive to the pool, you will lose the extra
space.

**Apparently if you later replace both of the smaller drives with 2 500 GB
drives, the pool should expand. However, I can not get this to work (the pool
stays stuck at the size of the lower drive). Others report success.
 
 
This message posted from opensolaris.org

Sure you can, but it would be something like this:

300GB-1 = c0t0d0
300GB-2 = c0t1d0
500GB   = c0t2d0s0 (300 GB slice is created on s0)

# zpool create test raidz c0t0d0 c0t1d0 c0t2d0s0

However, if you are going to use the add''l 200 GB on the 500GB
drive for something else, administration is more complicated.
I like things simple.

I think I would waste the 200 GB on the 500GB by creating a 3-way
raidz config, then evenually replace the 300GB disks with 500GB disks.

Take at look at the ZFS best practices site here for more info:

http://www.solarisinternals.com/wiki/index.php/ZFS_Best_Practices_Guide

cs
Marcus Sundman wrote:
> Let''s say I have two 300 GB drives and one 500 GB drive. Can I put
a
> RAID-Z on the three drives and a separate partition on the last 200 GB
> of the 500 GB drive?
> 
> - Marcus
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