block group size of a filesystem

Pouchie1 · #1 (**permalink**) 07-12-2009

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,

jim mcnamara · #2 (**permalink**) 07-14-2009

Linux? then try:

Code:

dumpe2fs /dev/hda3 | grep -i superblock

Pouchie1 · #3 (**permalink**) 07-25-2009

Thanks. It works

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