From: Kay Sievers <kay.sievers@vrfy.org>
To: linux-hotplug@vger.kernel.org
Subject: Re: vol_id and RAID1 members
Date: Fri, 27 Jan 2006 16:02:45 +0000 [thread overview]
Message-ID: <20060127160245.GA3422@vrfy.org> (raw)
In-Reply-To: <20060124223036.GA16374@wonderland.linux.it>
On Fri, Jan 27, 2006 at 02:06:15PM +0100, Marco d'Itri wrote:
> On Jan 25, Kay Sievers <kay.sievers@vrfy.org> wrote:
>
> > Sure, vol_id does look at the raid signature and ignores it, that's the
> > reason your raid did not show up in the past. Does the degration of the
> > device means that the raid signature is no longer valid?
> Yes. Indeed, vol_id gets EIO when trying to read the superblock.
>
> I think that in this case it should report the error and exit, because
> as I showed if the partition really is an array member then it will
> report wrong information which if used will cause data loss.
But how can returning an error by reading the very end of the device
be an indication for a raid device? If we can't find a raid signature,
we should look for a filesystem. I've seen some devices, where the
reported size is not fully readable and they would fail with such a logic,
which would break other things.
Kay
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next prev parent reply other threads:[~2006-01-27 16:02 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-24 22:30 vol_id and RAID1 members Marco d'Itri
2006-01-24 23:55 ` Kay Sievers
2006-01-27 13:06 ` Marco d'Itri
2006-01-27 16:02 ` Kay Sievers [this message]
2006-01-27 16:35 ` Marco d'Itri
2006-01-27 16:48 ` Kay Sievers
2006-01-27 16:56 ` Marco d'Itri
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