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Re: how cant I rebuild the superblock

To: sven@xxxxxxxxxxxxx
Subject: Re: how cant I rebuild the superblock
From: Steve Lord <lord@xxxxxxx>
Date: Wed, 30 Mar 2005 10:11:40 -0600
Cc: linux-xfs@xxxxxxxxxxx
In-reply-to: <2476072.1112198333228.OPEN-XCHANGE.WebMail.wwwrun@postgirl>
References: <2545159.1112195262796.OPEN-XCHANGE.WebMail.wwwrun@postgirl> <424AC78C.70708@xfs.org> <2476072.1112198333228.OPEN-XCHANGE.WebMail.wwwrun@postgirl>
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Sven Gehr wrote:
Am Mi 30.03.2005 17:36 schrieb Steve Lord <lord@xxxxxxx>:
[...]

do dd if=/dev/md0 of=/tmp/block bs=16k count=1


then do od -xa on this file and send the output to the list, it will
be fairly simple to see if you lost more than the super block.


the output is in the attachment file. I hope the list accept mails with
attachments?


Hmm, are you sure your disks are in the correct order inside md? Did your devices perhaps get renumbered somehow - by plugging in new drives perhaps. You have xfs inodes at block zero here, so this does not look like it was the start of a filesystem to me.

Look at the start of all your component drives with od -xa, you are looking
for one which starts out with XFSB in ascii.

Steve


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