Peter Havens <peter.havens@gmail.com> wrote:
> I was wondering, if my current metadevice is named d90, can I create a
> new mirror named d95 that includes d90 as a submirror (e.g. metainit
> d95 -m d90) without damaging d90, and while d90 is live?

Yes.

> If so, then I
> could attach the new metadevice to d95, and be on my merry way.

Not while d90 is live.

You can set up the mirror (one-way only), but you cannot start using the
mirror until you unmount d90 from use. So one possible path:

d90 in use (mounted)
create mirror d95
attach d90 to d95
create metadevice on new storage (d91?)
unmount d90
mount d95
attach d91 to d95

You have downtime for the storage this way (it has to be unmounted), but
it only has to be unmounted for a short period of time.

--
Darren Dunham ddunham@taos.com
Senior Technical Consultant TAOS http://www.taos.com/
Got some Dr Pepper? San Francisco, CA bay area
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