From: Jeff Garzik <jgarzik@pobox.com>
To: Matt Domsch <Matt_Domsch@dell.com>
Cc: linux-raid@vger.kernel.org
Subject: Re: DDF Trial Use draft specification now publicly available
Date: Thu, 11 Mar 2004 15:43:18 -0500 [thread overview]
Message-ID: <4050CF66.8090409@pobox.com> (raw)
In-Reply-To: <20040311154542.GA6173@lists.us.dell.com>
Matt Domsch wrote:
> The Disk Data Format (DDF) trial use draft spec has now been published
> by SNIA. This is the common on-disk metadata format that
> RAID vendors have been driving towards, which should allow one to move
> disks from one vendor's RAID controller to another vendor's RAID
> controller without the backup-rebuild-restore that's currently needed.
>
> http://www.snia.org/tech_activities/ddftwg
Thanks for posting this.
I haven't even read past "locality" section to find brokenness. DDF
RAID groups (a.k.a. each RAID array) must store information about other
RAID groups "on the controller." There is also apparently
per-controller state information one must care about. While I
understand why they would want this, this also means the format is quite
a bit less flexible than md, and in some respects, more difficult to
work with.
/me continues reading...
next prev parent reply other threads:[~2004-03-11 20:43 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-11 15:45 DDF Trial Use draft specification now publicly available Matt Domsch
2004-03-11 16:08 ` Samuel Davidoff
2004-03-11 16:18 ` Matt Domsch
2004-03-11 20:43 ` Jeff Garzik [this message]
2004-03-12 7:27 ` Scott Long
2004-03-12 21:07 ` Jeff Garzik
2004-03-12 22:27 ` Scott Long
2004-03-11 22:07 ` Jeff Garzik
2004-03-12 7:55 ` Scott Long
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