block group size of a filesystem

Applications UNIX Desktop Questions & Answers
1

How can I determine the block group size of my filesystem, in case I would like to determine where my backup superblocks are? Or how can I determine the location of my backup superblock?

If usually, for the block group size of 1k, the alternate superblock will be at block 8193.

Thanks,

2

Linux? then try:

dumpe2fs /dev/hda3 | grep -i superblock

Note the hda3 is an example

3

Thanks. It works