From: Phil Turmel <philip@turmel.org>
To: Piotr Klimek <piotr@klimek.net.pl>, linux-raid@vger.kernel.org
Subject: Re: RAID6 reshape integer problem
Date: Fri, 03 Jan 2014 12:07:21 -0500 [thread overview]
Message-ID: <52C6EE49.2000907@turmel.org> (raw)
In-Reply-To: <CAM8eUy0=YbC68vesaLPSp0RhL_2c8byVyROMGv2DdQ2_JSjYrg@mail.gmail.com>
On 01/03/2014 08:34 AM, Piotr Klimek wrote:
> 2014/1/3 Phil Turmel <philip@turmel.org>
>
>>
>>> After couple of days reshape stalled on 2147483648 block. I have found
>> that
>>> this is a bug in mdadm. 2147483648 is max integer on 32 bit system. For
>> now
>>> situation looks like this:
>>
>> You'll certainly have to take production down long enough to let a newer
>> kernel finish the reshape. Or you could be brave and replace the kernel
>> and let production continue through the balance of the reshape.
>>
>
> Is it safe to reboot during reshape and boot up with new kernel? I can
> easly upgrade kernel to 3.2.0.
>
It is supposed to be safe. With a clean shutdown, the superblock will
have a record of the reshape progress and will be able to continue after
re-assembly.
But you'll probably have to assembly manually to specify the location of
the critical section backup file. If your root FS is in this array,
you'll have to intervene in the initramfs.
HTH,
Phil
next prev parent reply other threads:[~2014-01-03 17:07 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-03 9:30 RAID6 reshape integer problem Piotr Klimek
2014-01-03 12:56 ` Phil Turmel
2014-01-03 13:43 ` Piotr Klimek
[not found] ` <CAM8eUy0=YbC68vesaLPSp0RhL_2c8byVyROMGv2DdQ2_JSjYrg@mail.gmail.com>
2014-01-03 17:07 ` Phil Turmel [this message]
2014-01-08 11:19 ` Piotr Klimek
2014-01-08 16:32 ` joystick
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