[Koha] help for debian partition for koha

[Ram Verma]

Dear All,

I am new to Debian and Koha, what is the criteria for space allocation in
Debian Partition?
I will be using only one operating System: Debian 6.0.5 (Squeeze); and the
system is dedicated for  Koha 3.8.3; Hard disk space is: 320 GB, RAM: 2GB

Could you please guide me for meaningful partitioning of Debian.

/(root) = ?
/boot =?
/usr =?
/var =?
/opt =?
/tmp =?
/backup for koha-data (manually created)  =?

Thank You.
Ram.