How do you install a Mavericks domain on two separate disks ?

Question

Hello troubleshooters and setup saviours,
We are a school with 200+ users on an OD managed on a Mac Pro server.
We decided to migrate to Mavericks, in order to fix several AFP binding bugs, from a 10.8 with server Apps.
We decided to give our server a SSD boost, and successfully installed the OS on this disk, with the server Apps and domain users.
So now, our system is on the SSD drive, and we want the network homes on a separate Hard Drive.
The problem occured when we tried to create the old users folders on our server, using the server manager and workgroup manager gave the same result.
Upon creation of the homes, a big amount of phantom data appeared on our system's disk.
We had 100 GB of unspecified, unlabeled, unverifiable data created on this disk, and since it's a 128 GB disk, the system hang and the server crashed.
We tried to find it with "du", and even the monitoring tools in Mavericks, but nothing helped, and this data seems to be nowhere.
Did anybody manage to install an OD domain on two disks ?
Thank you for your time and support,
L. Renard

Answer 1

Swap is managed automatically and is stored on the boot volume in /private/var/vm
/private/var would not normally show up in /Volumes
/Volumes is normally used to hold entries for either additional or external disks, or network volumes. The boot volume is however also listed so the following
/Volumes/Macintosh HD/private/var
would normally represent /private/var on the boot volume.
What in /private/var is the area using up all the space? You can use the following command in terminal to list a break down
du -h /path/to/folder
you might want it to only list one level down which you can do as follows
du -h -d1 /path/to/folder
e.g. du -h -d1 /Volumes/"volume"/private/var