All filesystems, HFS+, NTFS, FAT, FAT32, UFS, etc.. are subject to fragmentation by their very nature. The degree to which they are subject to fragmentation varies, however. Both UFS and the latest HFS+ have been designed to resist fragmentation but it still happens. Panther does have two things to combat fragmentation - automatic defragmentation, and "hotfile" clustering. I would venture to guess that it could be that the you're running out of hard disk space, or have multiple swap files on there taking up lots of room (which could be indicative of insufficient RAM), and have excessive paging going on. Have your reboot times slowed? Do you keep your cube on 24x7? Instead of Norton, I'd recommend Disk Warrior - but I'd look into other things first - % of free disk space, number of pageouts, amount of RAM, etc.. --alan