[rhn-users] mount: /dev/md0: can't read superblock

Doctor Khumalo doctortechie at hotmail.com
Tue Dec 6 19:17:01 UTC 2005


That file didn't exist so I created it.  I've created a RAID-5 software RAID 
with 10 disks in the array.


>From: "Ron Arnett" <arnett at ParadigmGeo.com>
>Reply-To: Red Hat Network Users List <rhn-users at redhat.com>
>To: "Red Hat Network Users List" <rhn-users at redhat.com>
>Subject: RE: [rhn-users] mount: /dev/md0: can't read superblock
>Date: Tue, 6 Dec 2005 09:14:53 -0600
>
>Do You have the drives defined in /etc/mdadm.conf?
>It should look something like below except using your disks,
>
>[arnett at houid1202]/etc>more mdadm.conf
>DEVICE /dev/sdb1 /dev/sdc1
>ARRAY /dev/md0 devices=/dev/sdb1,/dev/sdc1
>
>-----Original Message-----
>From: rhn-users-bounces at redhat.com [mailto:rhn-users-bounces at redhat.com]
>On Behalf Of Doctor Khumalo
>Sent: Tuesday, December 06, 2005 9:03 AM
>To: rhn-users at redhat.com
>Subject: [rhn-users] mount: /dev/md0: can't read superblock
>
>Using fdisk, I create new disk partitions using the "Linux raid auto"
>type.
>
>I then create and define RAID device using mdadm. (mdadm -C /dev/md0 -l
>5 -n
>10 /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf /dev/sdg /dev/sdh
>/dev/sdi
>/dev/sdj /dev/sdk)
>
>Then I format the RAID device as an ext3 file system. In the example
>below
>we use 4Kb block size and a chunk-size of 64Kb:
>
>mke2fs -j -b 4096 -R stride=16 /dev/md0
>
>I reboot and found that I get the message:
>
>mount: /dev/md0: can't read superblock
>
>What am I missing?
>
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