From: Jeff Garzik <jgarzik@pobox.com>
To: "Justin T. Gibbs" <gibbs@scsiguy.com>
Cc: linux-kernel@vger.kernel.org, Kevin Corry <kevcorry@us.ibm.com>,
Neil Brown <neilb@cse.unsw.edu.au>,
linux-raid@vger.kernel.org
Subject: Re: "Enhanced" MD code avaible for review
Date: Thu, 25 Mar 2004 19:01:09 -0500 [thread overview]
Message-ID: <406372C5.600@pobox.com> (raw)
In-Reply-To: <1035780000.1080258411@aslan.btc.adaptec.com>
Justin T. Gibbs wrote:
>>Jeff Garzik wrote:
>>
>>Just so there is no confusion... the "failing over...in userland" thing I
>>mention is _only_ during discovery of the root disk.
>
>
> None of the solutions being talked about perform "failing over" in
> userland. The RAID transforms which perform this operation are kernel
> resident in DM, MD, and EMD. Perhaps you are talking about spare
> activation and rebuild?
This is precisely why I sent the second email, and made the
qualification I did :)
For a "do it in userland" solution, an initrd or initramfs piece
examines the system configuration, and assembles physical disks into
RAID arrays based on the information it finds. I was mainly implying
that an initrd solution would have to provide some primitive failover
initially, before the kernel is bootstrapped... much like a bootloader
that supports booting off a RAID1 array would need to do.
Jeff
next prev parent reply other threads:[~2004-03-26 0:01 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-19 20:19 "Enhanced" MD code avaible for review Justin T. Gibbs
2004-03-23 5:05 ` Neil Brown
2004-03-23 6:23 ` Justin T. Gibbs
2004-03-24 2:26 ` Neil Brown
2004-03-24 19:09 ` Matt Domsch
2004-03-25 2:21 ` Jeff Garzik
2004-03-25 18:00 ` Kevin Corry
2004-03-25 18:42 ` Jeff Garzik
2004-03-25 18:48 ` Jeff Garzik
2004-03-25 23:46 ` Justin T. Gibbs
2004-03-26 0:01 ` Jeff Garzik [this message]
2004-03-26 0:10 ` Justin T. Gibbs
2004-03-26 0:14 ` Jeff Garzik
2004-03-25 22:04 ` Lars Marowsky-Bree
2004-03-25 22:04 ` Lars Marowsky-Bree
2004-03-26 19:19 ` Kevin Corry
2004-03-31 17:07 ` Randy.Dunlap
2004-03-25 23:35 ` Justin T. Gibbs
2004-03-26 0:13 ` Jeff Garzik
2004-03-26 17:43 ` Justin T. Gibbs
2004-03-28 0:06 ` Lincoln Dale
2004-03-30 17:54 ` Justin T. Gibbs
2004-03-28 0:30 ` Jeff Garzik
2004-03-26 19:15 ` Kevin Corry
2004-03-26 20:45 ` Justin T. Gibbs
2004-03-27 15:39 ` Kevin Corry
2004-03-28 9:11 ` [dm-devel] " christophe varoqui
2004-03-30 17:03 ` Justin T. Gibbs
2004-03-30 17:15 ` Jeff Garzik
2004-03-30 17:35 ` Justin T. Gibbs
2004-03-30 17:46 ` Jeff Garzik
2004-03-30 18:04 ` Justin T. Gibbs
2004-03-30 21:47 ` Jeff Garzik
2004-03-30 22:12 ` Justin T. Gibbs
2004-03-30 22:34 ` Jeff Garzik
2004-03-30 18:11 ` Bartlomiej Zolnierkiewicz
2004-03-25 22:59 ` Justin T. Gibbs
2004-03-25 23:44 ` Lars Marowsky-Bree
2004-03-25 23:44 ` Lars Marowsky-Bree
2004-03-26 0:03 ` Justin T. Gibbs
[not found] <1AOTW-4Vx-7@gated-at.bofh.it>
[not found] ` <1AOTW-4Vx-5@gated-at.bofh.it>
2004-03-18 1:33 ` Andi Kleen
2004-03-18 2:00 ` Jeff Garzik
2004-03-20 9:58 ` Jamie Lokier
-- strict thread matches above, loose matches on Subject: below --
2004-03-17 18:14 Justin T. Gibbs
2004-03-17 19:18 ` Jeff Garzik
2004-03-17 19:32 ` Christoph Hellwig
2004-03-17 19:32 ` Christoph Hellwig
2004-03-17 20:02 ` Jeff Garzik
2004-03-17 20:02 ` Jeff Garzik
2004-03-17 21:18 ` Scott Long
2004-03-17 21:35 ` Jeff Garzik
2004-03-17 21:45 ` Bartlomiej Zolnierkiewicz
2004-03-18 0:23 ` Scott Long
2004-03-18 1:55 ` Bartlomiej Zolnierkiewicz
2004-03-18 6:38 ` Stefan Smietanowski
2004-03-20 13:07 ` Arjan van de Ven
2004-03-21 23:42 ` Scott Long
2004-03-22 9:05 ` Arjan van de Ven
2004-03-22 21:59 ` Scott Long
2004-03-22 22:22 ` Lars Marowsky-Bree
2004-03-23 6:48 ` Arjan van de Ven
2004-03-18 1:56 ` viro
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