From: Tomasz Chmielewski <mangoo@wpkg.org>
To: Neil Brown <neilb@suse.de>
Cc: saeed bishara <saeed.bishara@gmail.com>,
Tuomas Leikola <tuomas.leikola@gmail.com>,
linux-raid@vger.kernel.org
Subject: Re: Linux RAID migration
Date: Tue, 07 Aug 2007 12:37:39 +0200 [thread overview]
Message-ID: <46B84B73.6090803@wpkg.org> (raw)
In-Reply-To: <18104.18410.623573.929770@notabene.brown>
Neil Brown schrieb:
(...)
>>>> - can I really assume that RAID 5 on 2 hdds (degraded mode) will
>>>> function as raid 5?
>>> You should test by using loopback devices and files. But why degraded?
>>> raid5 of two disks should look like raid1.
>> I meant to ask whether raid 5 on 2 disks will function as raid1 :(
>
> A 2-disk raid5 and a 2-disk raid1 put the data in exactly the same
> place - is that what you wanted to know?
Is the same valid for RAID-10?
Let's say, you degraded a 4-disk RAID-10 to just 2 (proper) disks.
Then, you want to migrate it to 2-disk, 3, 4, and eventually, 5-disk
RAID-5 array.
Would the RAID-10 -> RAID-5 migration be as easy as in RAID-1 -> RAID-5
case?
--
Tomasz Chmielewski
http://wpkg.org
prev parent reply other threads:[~2007-08-07 10:37 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-07 8:16 Linux RAID migration saeed bishara
2007-08-07 8:26 ` Tuomas Leikola
2007-08-07 10:02 ` saeed bishara
2007-08-07 10:22 ` Neil Brown
2007-08-07 10:32 ` saeed bishara
2007-08-07 10:46 ` saeed bishara
2007-08-07 11:18 ` Neil Brown
2007-08-07 11:31 ` saeed bishara
2007-08-07 11:40 ` Neil Brown
2007-08-07 13:27 ` saeed bishara
2007-08-07 15:15 ` saeed bishara
2007-08-09 3:23 ` Neil Brown
2007-08-15 9:02 ` SWAP file on a RAID-10 array possible? Tomas France
2007-08-15 10:10 ` David Greaves
2007-08-15 10:28 ` Tomas France
2007-08-15 12:59 ` David Greaves
2007-08-15 14:32 ` Daniel Korstad
2007-08-15 21:42 ` Michael Tokarev
2007-08-18 8:52 ` Tomas France
2007-08-15 22:02 ` Bill Davidsen
2007-08-07 10:37 ` Tomasz Chmielewski [this message]
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