Re: ZFS asymmetric mirror

On Jun 21, 9:33 pm, "Colin B." <cbi...@xxxxxxxxxxxxxxxxxxxxx> wrote:
On my glued-together workstation at home, I've decided to finally move
to ZFS root. Only problem is, my two internal disks are 18GB and 36GB
respectively. At first I was going to split the 36GB and only a slice
of it to mirror the 18GB, but then I thought: What happens if I create
a mirrored zpool with two different-sized disks? Will it automatically
match the smaller one in the pool? And if so, does this provide any
advantage over giving a slice to the pool instead?

Thanks!
Colin

In order to boot from ZFS you need an SMI label on the disk. i.e. You
need to boot off a slice rather than the whole disk.

I've not tested this but I'm sure you can mirror two different size
disks with the same sized slice into an rpool to boot from.

Not sure if there are any implications from a bootblk perspective !

You can't however mirror two different sized slices from two different
sized disks as far as I know.
.

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