I have been using Parallels Plesk formally Plesk (SWOSFT) since version 7.5. The software is great, I am running it on Linux and my host OS (operating system) is Cent OS 5.x. Partitioing Plesk is very easy, by default all hosted accounts are configured in /www/var/vhosts. This is the path where websites will be hosted.
You will see that I used Logical Volumes, that way if I need to increase or decrease space for a particular partition I can. When I partition my drive(s) I will make set up the following structure: (this setup was done a 100GB Virtual Machine)
Logical Volume Max partition size
swap double physical memory (LVM)
/root 25000MB or 25GB (LVM)
/var 75000MB or 75GB (LVM)
Once the system is created your drive will look as follows:
[[email protected] ~]$ df -h
Filesystem Size Used Avail Use% Mounted on
24G 6.2G 17G 28% /
72G 418M 68G 1% /var
/dev/sda1 190M 12M 169M 7% /boot
If you have any questions or comments please let me know! The following link will take you to Parallels Plesk Partitioning knowledge base document Plesk Partitioning. The document is very straight forward and easy to read.