Re: add another disk to existing raid 0, ie grow raid 0 possible?

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From: Nikolay Kichukov <hijacker@oldum.net>
To: NeilBrown <neilb@suse.de>
Cc: "Mathias Burén" <mathias.buren@gmail.com>,
	linux-raid <linux-raid@vger.kernel.org>
Subject: Re: add another disk to existing raid 0, ie grow raid 0 possible?
Date: Thu, 16 Feb 2012 17:38:52 +0200	[thread overview]
Message-ID: <4F3D230C.5000503@oldum.net> (raw)
In-Reply-To: <20120216175553.654595b4@notabene.brown>

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Hi,
It really might be fixed in recent code, just for consistency:

dpkg -l | grep mdadm
ii  mdadm                                         3.2.3-2                          tool to administer Linux MD arrays
(software RAID)

uname -a
Linux hanna64 3.1.0-1-amd64 #1 SMP Tue Jan 10 05:01:58 UTC 2012 x86_64 GNU/Linux



Cheers,
- -Nik

On 02/16/2012 08:55 AM, NeilBrown wrote:
> On Tue, 14 Feb 2012 11:43:30 +0200 Nikolay Kichukov <hijacker@oldum.net>
> wrote:
> 
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>> Hello Neil,
>> Here is the result, I think I managed to reproduce it as it has converted the raid0 to raid4.
> 
> 
>> so commands in sequence:
> 
>> mdadm --verbose --create /dev/md/mdtest --level=0 --raid-devices=2 --metadata=1.2 /dev/loop0 /dev/loop1
>> mdadm: chunk size defaults to 512K
>> mdadm: array /dev/md/mdtest started.
> 
>> strace -o /tmp/foo -f mdadm --grow /dev/md/mdtest --raid-devices=3 --add /dev/loop2
>> mdadm: level of /dev/md/mdtest changed to raid4
>> mdadm: /dev/loop2 not large enough to join array
>> mdadm: Need to backup 3072K of critical section..
>> mdadm: /dev/md/mdtest: Cannot grow - need a spare or backup-file to backup critical section
>> mdadm: aborting level change
> 
> 
> I tried exactly that and it worked perfectly.
> Maybe the bug has been fixed.
> Please remind me exactly which versions of mdadm and linux you are using.
> 
> Thanks,
> NeilBrown
> 
> 
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next prev parent reply	other threads:[~2012-02-16 15:38 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-01-26 10:26 add another disk to existing raid 0, ie grow raid 0 possible? Nikolay Kichukov
2012-01-26 10:47 ` Mathias Burén
2012-01-26 10:57   ` NeilBrown
2012-01-26 11:30     ` Nikolay Kichukov
2012-01-26 11:52       ` NeilBrown
2012-01-26 12:12         ` Nikolay Kichukov
2012-02-09  3:50       ` NeilBrown
2012-02-10 14:10         ` Nikolay Kichukov
2012-02-12 22:07           ` NeilBrown
2012-02-14  9:43             ` Nikolay Kichukov
2012-02-16  6:55               ` NeilBrown
2012-02-16 15:38                 ` Nikolay Kichukov [this message]
2012-02-20  5:26                   ` NeilBrown

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