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Old 10-11-2008, 09:01 PM
John Nelson
 
Default Backup Superblocks

Where does ext3 store the backup superblock? Does it have one at the
very beginning of the partition and one at the very end?


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Old 10-11-2008, 09:41 PM
"Stephen Samuel"
 
Default Backup Superblocks

It stores them in various places, depending on the size of your filesystem.
If your filesystem is large enough (>~ 1/2 GB) you'll probably find it at block #32768.
For smaller filesystems, it appears to put the first backup at block # 8193


You can get more details by using the -n option to mkfs. If you used nonstandard options in your original mkfs, you might want to provide those details here, as well.* (( -n has mkfs.ext[23] not actually write to the partition but simply say what it WOULD do if it did. ))


mkfs -t ext2 -n /dev/mydeice


On Sat, Oct 11, 2008 at 2:01 PM, John Nelson <articpenguin3800@gmail.com> wrote:

Where does ext3 store the backup superblock? Does it have one at the very beginning of the partition and one at the very end?




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