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Date:      Tue, 10 Apr 2007 22:22:32 +0200
From:      Pawel Jakub Dawidek <pjd@FreeBSD.org>
To:        freebsd-current@FreeBSD.org, freebsd-fs@FreeBSD.org
Subject:   Re: ZFS - quick start.
Message-ID:  <20070410202232.GE90135@garage.freebsd.pl>
In-Reply-To: <20070410172256.GA1401@roadrunner.q.local>
References:  <20070406214325.GB61039@garage.freebsd.pl> <20070410172256.GA1401@roadrunner.q.local>

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On Tue, Apr 10, 2007 at 07:22:56PM +0200, Ulrich Spoerlein wrote:
> Hi Pawel,
>=20
> impressive stuff. Is it possible and useable to use ZFS as a GMIRROR
> replacement where one disk is detached most of the time?
>=20
> I use an external (Firewire) disk to mirror my system disk. It gets only
> attached once a week for synchronizing. That way, I get a consistent
> 1:1 mirror of the system disk.

Yes, it is possible. The nice things about ZFS is that (because of
integrated with volume manager) it will know exactly which data to
synchronize, so won't be blindly synchronize entire disk.

> Does ZFS cope with detached drives as well? And can the detached drive
> function on its own? (Sometimes, I use this firewire drive as a
> portable disk to supplement my laptop storage).

I don't think that is possible, you may want to look for the answer in
zfs-discuss@opensolaris.org mailing list archives.

--=20
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd@FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!

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