Reducing disk fragmentation
If your system has been in use for some time, the constant creation
and removal of files creates a situation called
This means that the files in the filesystem are written in small pieces
on the hard disk, thus scattering the available disk space.
Disk fragmentation increases access time and reduces filesystem efficiency.
To reduce disk fragmentation on EAFS, AFS, and S51K filesystems:
This procedure rewrites all the files during the restore. Each file is written in one piece on the disk, thus consolidating the available disk space and reducing disk fragmentation. You also recover a small amount of space when you run this procedure.
Run this procedure about once a year on a heavily used system (less often on a lightly used system).