From: Lars Marowsky-Bree <lmb@suse.de>
To: Oktay Akbal <oktay.akbal@s-tec.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: md multipath with disk missing ?
Date: Mon, 9 Sep 2002 17:06:48 +0200 [thread overview]
Message-ID: <20020909150648.GD29@marowsky-bree.de> (raw)
In-Reply-To: <Pine.LNX.4.44.0209091537020.12771-100000@omega.s-tec.de>
On 2002-09-09T15:46:15,
Oktay Akbal <oktay.akbal@s-tec.de> said:
> Example:
>
> We have sda - sdb (8 drives) and setup up a raidtab to tell linux that
> sda and sde are the same sdc - sdd etc.
> Now for some random error the server restarts and the former sda (path to
> that drive) is no longer available. So now we have sda,sdb...sdg.
> We do not use autodetect, but raidstart to activate the raid.
>
> now since the former sda is missing the raidtab does not reflect the
> actual setup. The raidtab would read, that sda and sdb are the same
> drive, which is not true in that case.
>
> (The device-ordering would not be right for a real setup, but take it as
> an example and assume sda-sde sdb-sdf...)
>
> Would the superblock prevent the wrong use of devices ?
I hope so. But yes, your setup would break spectularly because the devices
moved and the raids wouldn't go online. This shouldn't happen with the
autostart feature, I think.
Sincerely,
Lars Marowsky-Brée <lmb@suse.de>
--
Immortality is an adequate definition of high availability for me.
--- Gregory F. Pfister
next prev parent reply other threads:[~2002-09-09 15:01 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-09 13:08 md multipath with disk missing ? Oktay Akbal
2002-09-09 13:27 ` Lars Marowsky-Bree
2002-09-09 13:46 ` Oktay Akbal
2002-09-09 13:50 ` Steve Mickeler
2002-09-09 20:45 ` Alan Cox
2002-09-09 15:06 ` Lars Marowsky-Bree [this message]
2002-09-10 22:51 ` Neil Brown
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