From: "Wesley W. Terpstra" <wesley@terpstra.ca>
To: linux-raid@vger.kernel.org
Subject: Re: BUG drivers/md/md.c: data-offset reshape renders array unloadable
Date: Sat, 24 Jan 2015 23:23:18 +0100 [thread overview]
Message-ID: <CAA-O0XgXc0H4H__8ygLzt_BBW3NpEseG9NZBTZ_syMdir8D=mA@mail.gmail.com> (raw)
In-Reply-To: <CAA-O0Xjustt5=nNoDzXukY=f-7OwRk=yqug8MCpxcXCt4MdiTw@mail.gmail.com>
On Sat, Jan 24, 2015 at 10:44 PM, Wesley W. Terpstra <wesley@terpstra.ca> wrote:
> The reshape was going fine and was probably
> around 50% done when the system was rebooted.
It is also possible the system was hung, but continued the reshape
until completion.
> First, it is obviously the last test in super_1_load that is rejecting
> the array. The superblock reports more sectors than are calculated, so
> the check
> if (sectors < le64_to_cpu(sb->data_size)) {
> fails.
Thus, an alternative explanation could be that the the sb->data_size
was not updated after the reshape completed. The superblocks have a
"Feature Map: 0x0" according to mdadm. I gather from reading
linux/raid/md_p.h that it should at least have
MD_FEATURE_RESHAPE_ACTIVE, if the reshape were still in progress.
next prev parent reply other threads:[~2015-01-24 22:23 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-24 21:44 BUG drivers/md/md.c: data-offset reshape renders array unloadable Wesley W. Terpstra
2015-01-24 22:23 ` Wesley W. Terpstra [this message]
2015-01-25 16:46 ` Wesley W. Terpstra
2015-02-05 6:14 ` NeilBrown
2015-02-05 8:17 ` Wesley W. Terpstra
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