This script works best run from the top directory of each partition.

It is braindead simple and filesystem agnostic. You need to run it on a
mounted partition. It seems safe in my testing but comes with all the usual
warnings!

The maximum benefit seems to occur with two runs, and it seems to be
effective only if the initial fragmentation is > 2.5%.

Note if you use lilo as your loader and you defrag the partition containing
your kernel you will need to rerun lilo before rebooting!

Here is a sample of a /home partition containing 407564 files.

Before and after running this script:

Before:
filesystem: ext3
 mount status: mount
 fragmented percentage: 3.16%
 total blocks: 17194960
 system blocks: 269928
 file blocks: 9939228
 fragmented blocks: 314289
 sys-fragmented blocks: 44
 continuous files: 411125
 fragmented files: 43333
 max dir depth: 15

After:
filesystem: ext3
 mount status: mount
 fragmented percentage: 1.59%
 total blocks: 17194960
 system blocks: 269928
 file blocks: 9885890
 fragmented blocks: 157391
 sys-fragmented blocks: 56
 continuous files: 417985
 fragmented files: 29727
 max dir depth: 15


Best results I've had were on my compile directory:
Before:
filesystem: ext3
 mount status: mount
 fragmented percentage: 8.93%
 total blocks: 11698552
 file blocks: 290134
 fragmented blocks: 25918
 sys-fragmented blocks: 4
 continuous files: 83754
 fragmented files: 8155
 max dir depth: 15

After:
filesystem: ext3
 mount status: mount
 fragmented percentage: 0.21%
 total blocks: 9267264
 file blocks: 290134
 fragmented blocks: 618
 sys-fragmented blocks: 4
 continuous files: 91623
 fragmented files: 286
 max dir depth: 15


Get tools to measure fragmentation of ext2/3 here:
http://sourceforge.net/projects/davtools/

Con