How do you copy a backup superblock to the primary position? Or how so you tell the computer to look at a backup superblock?..... there it is! (<a href="http://linuxexpresso.wordpress.com/2010/03/31/repair-a-broken-ext4-superblock-in-ubuntu/">here</a>) &quot;<code class="functions">sudo</code> <code class="plain">e2fsck -b block_number /dev/</code><br>
xxx&quot; <br><br>I have  a question:  The first backup superblockwas at 131072. Are other backup blocks located every 131072?<br><div class="gmail_quote"><br>On Sat, Feb 18, 2012 at 5:28 PM, Matt Graham <span dir="ltr">&lt;<a href="mailto:danceswithcrows@usa.net" target="_blank">dan</a></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Also, if you&#39;re having trouble mounting an ext23 filesystem, something you<br>
might want to try is to mount it using the backup superblocks.  &quot;mount -t ext3<br>
-o sb=131072 /dev/sda2 /mnt/somewhere&quot; is the canonical first backup<br>
superblock to try.  Or since reading the disk appears to be working, copy each<br>
partition somewhere, make a copy of that copy, and attempt to work on that<br>
copy with e2fsck and/or debugfs.<br>
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