Issue:
How do I check the degree of fragmentation on an ext3 filesystem?
Resolution:
At boot time, the
fsck file system check program will report the degree of fragmentation on an ext3 file system. This program should be run on unmounted file systems only. You can check your / (root)
filesystem by issuing the command:
This will schedule an immediate reboot and force an automatic
filesystem check. Generally speaking,
ext3 filesystems handle optimization of fragmentation well over time. You could force contiguous storage of files by copying the data off the drive, wiping the drive, and then copying the data back on. Generally speaking this type of action should not be necessary.
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eUKShane 
http://www.eukhost.com
Check the degree of fragmentation on an ext3 filesystem
Linear Mode
