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andy007
n00b
Joined: 11 Jan 2004
Posts: 35
Location: Shanghai, China
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 Posted: Mon Feb 02, 2004 6:40 am Post subject: question on converting ext2 to ext3 |
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The following is an excerpt from an article. I wonder whether it will destroy data(especially an OS) stored on the right disk or not.
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Converting from Ext2 to Ext3
The conversion procedure is simple enough. Imagine /dev/hda10 mounted as /test ¨C the procedure would be as follows:
Log in as root
Make sure /etc/fstab has /dev/hda10 mounted to /test as ext2, read write
umount /dev/hda10
If you can't unmount it, then remount it read only (mount -o remount,rw /dev/hda10)
tune2fs -j /dev/hda10
Edit /etc/fstab, and for /dev/hda10, change ext2 to ext3
mount /dev/hda10
/sbin/shutdown -h now
mount | grep /dev/hda10
If it's not shown as ext3, reboot, if still not, troubleshoot
Otherwise, you're done.
A few explanations are in order. The tunefs command creates the journal file, which is kept in a special inode on the device (by default). You then must change the /etc/fstab entry to reflect it's a journalling filesystem, and then mount it.
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Evil Dark Archon
Guru
Joined: 21 Dec 2002
Posts: 562
Location: Santa Rosa, CA
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| Posted: Mon Feb 02, 2004 8:35 am Post subject: |
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no it won't destroy data, that would only happen if you did mke2fs -j /dev/hda10, tune2fs can only modify an existing filesystem, it cannot destroy data.
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Jake
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Joined: 31 Jul 2003
Posts: 1132
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| Posted: Mon Feb 02, 2004 8:35 am Post subject: |
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| All the command does, and all that needs to be done to upgrade from ext2 to ext3, is add a journal. There's no risk to your data. You can even mount the filesystem as ext2 after you've upgraded. It would just ignore the journal. |
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andy007
n00b
Joined: 11 Jan 2004
Posts: 35
Location: Shanghai, China
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| Posted: Mon Feb 02, 2004 10:31 am Post subject: |
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| thanks for all your replies |
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