FreeBSD 10 installer and ZFS root

[dteske at FreeBSD.org]

> -----Original Message-----
> From: kpneal at pobox.com [mailto:kpneal at pobox.com]
> Sent: Tuesday, March 11, 2014 12:17 PM
> To: dteske at FreeBSD.org
> Cc: 'David Christensen'; freebsd-questions at FreeBSD.org
> Subject: Re: FreeBSD 10 installer and ZFS root
> 
> On Mon, Mar 10, 2014 at 08:30:04PM -0700, dteske at FreeBSD.org wrote:
> > This is not to do with adding "a second disk ... as a mirror", however
> > if you did add a disk after the fact, you should take care to consider
> > the following:
> >
> > 1. The disk added should be sliced in the same way so you can add the
> > new disk's first partition as a new block device to the mirror vdev
> > named bootpool.
> >
> > 2. If your zroot is a raidz* vdev, take care not to add a
> > non-redundant vdev to the pool (e.g., add a raidz1 vdev to an existing
> > pool; not a single block device with no parity or backup).
> 
> To reiterate for importance:
> 
> Do NOT accidentally use 'zpool add'.
> 
> The command to add a new disk to an existing mirror (which increases
> redundancy), or to add redundancy to a single disk, is 'zpool attach'.
> 
> That's ======> 'zpool attach' <======= for mirroring.
> 
> If you use the wrong command you are SOL.

Words to live and die by.
-- 
Devin

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