From: Jakob Oestergaard <jakob@unthought.net>
To: venom@sns.it
Cc: Christoph Hellwig <hch@infradead.org>,
Dave Kleikamp <shaggy@austin.ibm.com>,
Florian Huber <florian.huber@mnet-online.de>,
JFS Discussion <jfs-discussion@www-124.southbury.usf.ibm.com>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [Jfs-discussion] md raid + jfs + jfs_fsck
Date: Wed, 28 Jan 2004 11:54:44 +0100 [thread overview]
Message-ID: <20040128105444.GK814@unthought.net> (raw)
In-Reply-To: <Pine.LNX.4.43.0401281021030.31225-100000@cibs9.sns.it>
On Wed, Jan 28, 2004 at 10:24:14AM +0100, venom@sns.it wrote:
>
>
> On Tue, 27 Jan 2004, Christoph Hellwig wrote:
> >
> > Yes, it does. But JFS should get the right size from the gendisk anyway.
> > Or did you create the raid with the filesystem already existant? While that
> > appears to work for a non-full ext2/ext3 filesystem it's not something you
> > should do because it makes the filesystem internal bookkeeping wrong and
> > you'll run into trouble with any filesystem sooner or later.
> >
> In most situation to create a new FS on a RAID1 MD is not an option.
> It happens that you have to mirror a partition, maybe alarge one, and it
> already had a filesystem on top of it. Then what should you do?
> backup, mirror and then restore? Sometimes it is not possible this too.
> Then you accept to deal with the possible problems...
Read The Fine Manual. :)
http://unthought.net/Software-RAID.HOWTO/Software-RAID.HOWTO-7.html#ss7.4
"Method 2" covers exactly this, for a root filesytem though, but you
should be able to adapt it.
/ jakob
next prev parent reply other threads:[~2004-01-28 10:54 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-27 19:15 md raid + jfs + jfs_fsck Florian Huber
2004-01-27 19:28 ` [Jfs-discussion] " Dave Kleikamp
2004-01-27 19:39 ` Florian Huber
2004-01-27 19:52 ` Florian Huber
2004-01-27 20:43 ` Dave Kleikamp
2004-01-27 20:53 ` Christoph Hellwig
2004-01-27 21:19 ` Florian Huber
2004-01-27 21:22 ` Christoph Hellwig
2004-01-27 23:39 ` Neil Brown
2004-01-27 21:47 ` Gene Heskett
2004-01-28 2:47 ` Theodore Ts'o
2004-01-28 9:24 ` venom
2004-01-28 9:38 ` Christoph Hellwig
2004-01-28 16:29 ` venom
2004-01-28 10:54 ` Jakob Oestergaard [this message]
2004-01-29 22:52 ` Helge Hafting
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