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Old 03-02-2009, 09:58 PM   #1
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raid0 created by mdadm can't be mounted after re-install the system

I have 5 sata disks on my computer and I create a raid0 using 4 disks to storage some data. Yesterday my debian 5 crashed while installing ati driver, so i re-installed an ubuntu 8.10 . After that I typed
sudo mdadm --create --verbose /dev/md0 --level=raid0 --raid-devices=4 /dev/sdb /dev/sdc /dev/sdd /dev/sde
and mount it. However while today I updated 260 softwares via the web, it crashes again, so I tried to install debian5.0-lxde, but failed to boot because of a (hd0,4) partition error, so I changed back to ubuntu 8.10 . But this time when i use the same command to create the raid, it can't be mounted, the following error message is coming out:
mount: you must specify the filesystem type
Anyone knows what is the problem?? Thank you very much.
Old 03-03-2009, 12:00 AM   #2
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ok.. I used fsck -t ext3 -a /dev/md0 and the data is back.
Old 03-03-2009, 02:38 AM   #3
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Did you tried running this command on Debian too ?

Last edited by vikas027; 03-03-2009 at 02:42 AM. Reason: I skipped few lines while reading.
Old 03-04-2009, 09:05 PM   #4
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no, I had not a chance to run debian because it is unable to boot, though I successfully installed it some weeks ago. While i typed
fsck -t ext3 -a /dev/md0
it returns a message abount some inode error, and let me use the -b option, so I write a shell script to try from -b 1 to -b 10000 , and it works at about b=8200.


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