Even that seems a little over the top to me.
Generally I tend to partion only /var /home / and obviously /swap separately
In the case of a fileserver, I would tend to dedicate the entire new drive to providing /home and then have another (smaller) to provide the rest.
In fact if it was me, and except for very rare cases I wouldn't be building a fileserver on a single disk in the first place...RAID was invented for a reason (three actually).
I have just got an 80Gb Hdd for our new Linux Fileserver, I was thinking something like this:
/ 2Gb /tmp 2Gb /var 4Gb /usr 5Gb /usr/local 5Gb /home 60Gb swap 2Gb
Why bother separating /, /usr and /usr/local into separate filesystems, BTW? I can see why a separate / makes sense if there's only limited space for the root filesystem, but that's evidently not the case here...