John Stoffel - 2006-03-29

Hi

How do I determine the size of the existing
journal on an ext3 filesystem?  tune2fs -l doesn't show this info at all.

Doing:

  jfsnew:~> sudo tune2fs -J size=102400 /dev/sda1
  tune2fs 1.39-WIP (31-Dec-2005)
  The filesystem already has a journal.

Isn't really helpful.  I did try to do a 'debugfs' run on my filesystem, but I don't know how to interpret the output of 'logdump'
to just determine the size:

    .
    .
    .
    Found expected sequence 4212, type 1 (descriptor block) at block 1210
    Found expected sequence 4212, type 2 (commit block) at block 1219
    Found expected sequence 4213, type 1 (descriptor block) at block 1220
    Found expected sequence 4213, type 2 (commit block) at block 1229
    Found expected sequence 4214, type 2 (commit block) at block 1230
    No magic number at block 1231: end of journal.

Thanks,
John
john@stoffel.org