From: Ken Causey <ken@ineffable.com>
To: Neil Brown <neilb@cse.unsw.edu.au>
Cc: linux-raid@vger.kernel.org
Subject: Re: Can't add missing member back in???
Date: 26 Jun 2002 13:14:19 -0500 [thread overview]
Message-ID: <1025115259.594.25.camel@temp> (raw)
In-Reply-To: <15642.855.558011.545081@notabene.cse.unsw.edu.au>
On Wed, 2002-06-26 at 13:09, Neil Brown wrote:
> On June 26, ken@ineffable.com wrote:
> > Hi,
> >
> > Interesting problem. I'm setting up an all software RAID system and
> > after a few fits and starts have reached some success. I started to do
> > some testing and have run into a problem. What I was doing is I was one
> > by one unplugging one of the SCSI drives and then powering up the system
> > to make sure it would power up properly. The first time I did this
> > everything worked great. I plugged the drive back up and used
> > raidhotadd to recover and got everything to UUU. I then powered off and
> > unplugged another drive, system boots up great with only two drives.
> > Now its time to plug the drive back in and rebuild the array to be ready
> > to unplug the last of the three drives for a thorough test. Only, now I
> > can ONLY boot up if I DO NOT have the missing drive plugged in. This is
> > really weird. If I have all three devices attached then it claims that
> > 2/3 of the devices that make up md2 (my root) are unavailable and well
> > then we are screwed. WTF?
>
> Let me guess... you are using "raidstart" to start the arrays?
Exactly.
> If so, that is your problem. It is broken.
Ok. Good to know.
> Either change the partition type to use auto-detect, or use
> mdadm:
> http://www.cse.unsw.edu.au/~neilb/source/mdadm/
>
mdadm it will have to be. I'm using an initrd kernel and autodetection
is very specifically removed in the raid modules.
> If you aren't using raidstart, tell me and I try harder.
This is a very good start and I suspect it will fix me. Now if only
mkinitrd would use mdadm automatically rather than raidstart... Oh
well, that's a battle for another day.
Ken Causey
>
> NeilBrown
>
prev parent reply other threads:[~2002-06-26 18:14 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-06-26 17:10 Can't add missing member back in??? Ken Causey
2002-06-26 18:09 ` Neil Brown
2002-06-26 18:14 ` Ken Causey [this message]
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