I got a 24.01GB OSX partition, a 9.13GB Users partition including mp3z, and a 5GB "Other" partition which currently holds OS9 but should go soon...thats on an iMac600 w/40GB and 640MB...
anyway, for disk maintenance, I just use the builtin stuff mostly but I do have Norton Systemworks which isn't all that great...it doesn't have a OSX native defragger and it slowed my computer down when i installed it so I got rid of it and might run it off the cd if I ever run into a fat problem...I make sure the /etc/daily weekly and monthly script are run properly, I update my prebindings quite often and if there seems to be a problem, i run fsck -y...but I'm yet to run into anything serious..
anyway, for disk maintenance, I just use the builtin stuff mostly but I do have Norton Systemworks which isn't all that great...it doesn't have a OSX native defragger and it slowed my computer down when i installed it so I got rid of it and might run it off the cd if I ever run into a fat problem...I make sure the /etc/daily weekly and monthly script are run properly, I update my prebindings quite often and if there seems to be a problem, i run fsck -y...but I'm yet to run into anything serious..