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Date:      Mon, 20 May 2002 23:05:02 +0200
From:      Bernd Walter <ticso@cicely5.cicely.de>
To:        Henrik Hudson <rhavenn@rhavenn.net>
Cc:        questions@FreeBSD.ORG
Subject:   Re: FSCK, RAID and "Magic Numbers"
Message-ID:  <20020520210502.GC72276@cicely5.cicely.de>
In-Reply-To: <3CE47837.12770.2C35BA0@localhost>
References:  <3CE47837.12770.2C35BA0@localhost>

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On Fri, May 17, 2002 at 03:25:43AM -0500, Henrik Hudson wrote:
> Hello List-
> 
> I rebooted (ie: hit the reset switch) by accident tonight on my server. 
> 
> Server is running 4.5 release with a Mylex RAID controller on it. 2 RAID 
> 1 disks are setup.
> 
> /etc/fstab:
> 
> /dev/da0s1b   none            swap    sw              0       0
> /dev/da1s1b   none            swap    sw              0       0
> /dev/da0s1a   /               ufs     rw              1       1
> /dev/da1s1e   /data   ufs     rw,userquota            2       2
> /dev/da0s1h   /tmp            ufs     rw              2       2
> /dev/da0s1e   /usr            ufs     rw              2       2
> /dev/da0s1f    /usr/local              ufs     rw              2       2
> /dev/da0s1g             /var            ufs     rw              2       2
> 
> 
> When I run fsck -p /dev/da0s1    it works just fine. I am "supposed" to 
> do it this way even on a RAID disk, since the controller is taking care 
> of  making sure the correct disk(s) are being written to underneath the 
> hood, right? Just checking :)
> 
> My main problem is when I run this on  /dev/da1s1  via: 
> 	fsck -p /dev/da1s1
> 
> I get the following error:
> /dev/da1s1: BAD SUPER BLOCK: MAGIC NUMBER WRONG
> 
> /dev/da1s1: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.
> 
> 
> Now, is this because the swap space is sitting up front? How would you 
> get around this problem?

run fsck on a partition ans not on the complete slice.
E.g. fsck /dev/da1s1e

Your case with da0s1 did run because your slice starts with the
filesystem from partition a - that's only luck.

-- 
B.Walter              COSMO-Project         http://www.cosmo-project.de
ticso@cicely.de         Usergroup           info@cosmo-project.de


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