mike wrote:
>> No that isn't correct.
>
>> One or move vdevs create a pool. Each vdev in a pool can be a
>> different type, eg a mix or mirror, raidz, raidz2.
>
>> There is no such thing as zdev.
>
> Sorry :)
>
> Okay, so you can create a zpool from multiple vdevs. But you cannot
> add more vdevs to a zpool once the zpool is created. Is that right?
Yes you can add more vdevs. What you can't do is add more disks to a
raidz or raidz2 vdev but you can add another raidz vdev to the pool.
For example:
I start out with a pool of 6 disks in a raidz that is one vdev.
I then add another 6 disks raidz that is two vdevs. Still one pool it
looks like this:
NAME STATE READ WRITE CKSUM
cube ONLINE 0 0 0
raidz1 ONLINE 0 0 0
c5t0d0 ONLINE 0 0 0
c5t1d0 ONLINE 0 0 0
c5t2d0 ONLINE 0 0 0
c5t3d0 ONLINE 0 0 0
c5t4d0 ONLINE 0 0 0
c5t5d0 ONLINE 0 0 0
raidz1 ONLINE 0 0 0
c5t8d0 ONLINE 0 0 0
c5t9d0 ONLINE 0 0 0
c5t10d0 ONLINE 0 0 0
c5t11d0 ONLINE 0 0 0
c5t12d0 ONLINE 0 0 0
c5t13d0 ONLINE 0 0 0
I could if I wanted to add another vdev to this pool but it doesn't
have to be raidz it could be raidz2 or mirror.
You can add more "sides" to a mirror vdev and you can turn a single
disk vdev into a mirror.
You can not mirror a raidz or raidz a mirror.
> That's what it sounded like someone said earlier.
If they did they are wrong, hope the above clarifies.
--
Darren J Moffat
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