From: Jim Klimov <klimov@2ka.mipt.ru>
To: Farkas Levente <lfarkas@bppiac.hu>
Cc: linux-raid@vger.kernel.org
Subject: Re[2]: ANNOUNCE: mdadm 2.4 - A tool for managing Soft RAID under Linux
Date: Thu, 30 Mar 2006 19:27:23 +0400 [thread overview]
Message-ID: <416672969.20060330192723@2ka.mipt.ru> (raw)
In-Reply-To: <442BA69B.3020904@bppiac.hu>
Hello Farkas,
FL> that's realy a long avaiting feature. but at the same time wouldn't it
FL> be finally possible to convert a non raid partition to an raid1? it's
FL> avery common thing and they used to said it's even working on windows:-(
That would be cooler than making a metadevice and copying tons of
files :)
However, AFAIK this would require some support on FS side as well?
FS-addressable space in a RAID metadevice (i.e. submirror) is aligned
till the pre-last 64K block. If the partition was used up completely,
the last [64..128]Kb can be used by its data and need to be remapped
to a free location. And this is quite FS-dependant (like grow/shrink)
and should be addressed by those FS toolkits.
tune2fs and e2fsck do some similar remapping job when we enable/disable
spare superblocks on a used filesystem...
--
Best regards,
Jim Klimov mailto:klimov@2ka.mipt.ru
next prev parent reply other threads:[~2006-03-30 15:27 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-30 4:34 ANNOUNCE: mdadm 2.4 - A tool for managing Soft RAID under Linux Neil Brown
2006-03-30 9:36 ` Farkas Levente
2006-03-30 15:27 ` Jim Klimov [this message]
2006-03-30 23:12 ` Maurice Hilarius
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