From: Neil Brown <neilb@suse.de>
To: Leslie Rhorer <lrhorer@satx.rr.com>
Cc: linux-raid@vger.kernel.org
Subject: Re: Confused about reshape?
Date: Mon, 31 May 2010 16:48:44 +1000 [thread overview]
Message-ID: <20100531164844.0f15838e@notabene.brown> (raw)
In-Reply-To: <B5.9D.03062.922530C4@cdptpa-omtalb.mail.rr.com>
On Mon, 31 May 2010 01:07:38 -0500
"Leslie Rhorer" <lrhorer@satx.rr.com> wrote:
> > -----Original Message-----
> > From: Neil Brown [mailto:neilb@suse.de]
> > Sent: Monday, May 31, 2010 12:58 AM
> > To: Leslie Rhorer
> > Cc: linux-raid@vger.kernel.org
> > Subject: Re: Confused about reshape?
> >
> > On Mon, 31 May 2010 00:32:07 -0500
> > "Leslie Rhorer" <lrhorer@satx.rr.com> wrote:
> >
> > > > Just tell mdadm what you want and it will do it, or report that it
> > cannot.
> > >
> > > Um, OK, I tried it, and it failed:
> > >
> > > Backup:/# mdadm --grow /dev/md0 --level=6
> > > mdadm: no changes to --grow
> >
> > cat /proc/mdstat ??
> > mdadm -D /dev/md0 ??
> > mdadm -V ??
> > uname -a ??
> >
> > Maybe add -vv to the --grow
>
> /dev/md0:
> Version : 1.02
> Creation Time : Sun Jul 12 20:44:02 2009
> Raid Level : raid5
> Array Size : 10255969024 (9780.85 GiB 10502.11 GB)
> Used Dev Size : 1465138432 (1397.26 GiB 1500.30 GB)
> Raid Devices : 8
> Total Devices : 9
> Persistence : Superblock is persistent
>
> Intent Bitmap : Internal
You'll probably need to remove the bitmap for --grow to work... I really
should fix that.
>
> Update Time : Mon May 31 00:44:25 2010
> State : active
> Active Devices : 8
> Working Devices : 9
> Failed Devices : 0
> Spare Devices : 1
>
> Layout : left-symmetric
> Chunk Size : 256K
>
> Name : Backup:0 (local to host Backup)
> UUID : 940ae4e4:04057ffc:5e92d2fb:63e3efb7
> Events : 987130
>
> Number Major Minor RaidDevice State
> 0 8 0 0 active sync /dev/sda
> 1 8 16 1 active sync /dev/sdb
> 2 8 32 2 active sync /dev/sdc
> 8 8 48 3 active sync /dev/sdd
> 4 8 64 4 active sync /dev/sde
> 5 8 80 5 active sync /dev/sdf
> 6 8 96 6 active sync /dev/sdg
> 7 8 112 7 active sync /dev/sdh
>
> 9 8 128 - spare /dev/sdi
>
> Backup:/tmp# mdadm -V >> temp
> mdadm - v3.0.3 - 22nd October 2009
I should have checked when you mention the mdadm version in the first email.
You need at least 3.1.1 to convert RAID5 to RAID6.
NeilBrown
>
> Backup:/tmp# uname -a
> Linux Backup 2.6.32-3-amd64 #1 SMP Wed Feb 24 18:07:42 UTC 2010 x86_64
> GNU/Linux
>
> Backup:/tmp# mdadm --grow -vv /dev/md0 --level=6 >> temp
> mdadm: no changes to --grow
>
>
>
next prev parent reply other threads:[~2010-05-31 6:48 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-30 23:29 Confused about reshape? Leslie Rhorer
2010-05-31 2:54 ` Neil Brown
2010-05-31 4:11 ` Leslie Rhorer
2010-05-31 4:50 ` Neil Brown
2010-05-31 5:25 ` Leslie Rhorer
2010-05-31 5:32 ` Leslie Rhorer
2010-05-31 5:57 ` Neil Brown
2010-05-31 6:07 ` Leslie Rhorer
2010-05-31 6:48 ` Neil Brown [this message]
2010-05-31 6:55 ` Leslie Rhorer
2010-05-31 9:12 ` Leslie Rhorer
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