Re: Can't start array and Negative "Used Dev Size"

[Simon Matthews <simon.d.matthews@gmail.com>]

Neil,

On Tue, Jun 28, 2011 at 10:18 PM, NeilBrown <neilb@suse.de> wrote:
> On Tue, 28 Jun 2011 21:29:37 -0700 Simon Matthews
> <simon.d.matthews@gmail.com> wrote:
>
>> Problem 1: "Used Dev Size"
>> ====================
>> Note: the system is a Gentoo box, so perhaps I have missed a kernel
>> configuration option or use flag to deal with large hard drives.
>>
>> A week or two ago, I resized a raid1 array using 2x3TB drives. I went
>
> Oopps.  That array is using 0.90 metadata which can only handle up to 2TB
> devices.  The 'resize' code should catch that you are asking the impossible,
> but it doesn't it seems.
>
> You need to simply recreate the array as 1.0.
> i.e.
>  mdadm -S /dev/md5
>  mdadm  -C /dev/md5 --metadata 1.0 -l1 -n2 --assume-clean

Before I do this (tomorrow), do I need to add the partitions to the command:

mdadm  -C /dev/md5 --metadata 1.0 -l1 -n2 --assume-clean /dev/sdd2 /dev/sdc2

Simon
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