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List:       linux-raid
Subject:    Re: Can't grow raid5 size
From:       "NeilBrown" <neilb () suse ! de>
Date:       2008-03-31 11:22:18
Message-ID: 53383.192.168.1.70.1206962538.squirrel () neil ! brown ! name
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On Mon, March 31, 2008 7:07 am, Shane W wrote:
> Hello all,
>
> I had a three drive raid5 array of 750GB drives.  Added a
> fourth drive and grew the array but the actual size didn't
> change.

The size wont change until it finishes restriping.  All the
data needs to be relocated before the new space is available.

What does "cat /proc/mdstat" show ??

>          Now when I do a mdadm --grow --size max /dev/md0,
> I get:
> mdadm: Cannot set device size/shape for /dev/md0: Device or
> resource busy

That is expected.  The array is busy restriping (aka reshaping).
You cannot change the size of individual devices at this time,
not that you really want to.



> Is there anything I can do to get the array to 2tb or do I
> need to recreate with a 1.x superblock format?

Using a different superblock format wouldn't help.

What is the current state of the array from /proc/mdstat?

NeilBrown

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