Replacing all disks in zroot

Johan Hendriks joh.hendriks at
Mon Sep 19 18:29:07 UTC 2016

Op 17/09/16 om 16:12 schreef Malcolm Matalka:
> Hello,
> Right now I have a ZFS on root on FreeBSD 10.3.  Currently I only have 1
> disk in zroot and it's too small.  So I would like to do the following
> thing, but I'm not sure if I need to do some special work to make the
> new setup bootable.
> 1. Bought 2 new, larger HDs.
> 2. Going to add one of them to the existing disk as a mirror and let it
> resilver.
> 3. Replace the small drive with the second drive I bought, removing the
> smaller drive.
> As I understand it, after this I will have the larger capacity,
> mirrored.  But will this be bootable?  Do I have to do something else to
> copy the boot setup over?
> Thanks,
> /Malcolm
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That should do the trick, like Mike said, you will need a boot partition
and a swap partition.
Also use the right command with zpool.
So do not use add but ATTACH, this way you create a mirror.
If you add a disk , your pool is then a pool with two vdevs without any


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