Types Introduction to the Unix Cluster.
Scratch disks are the next level down from home disks in priority.
As with home disks, scratch disks are shared between machines, so you can access your files on a scratch disk no matter which computer you're on. Temporary disks are for, you guessed it, temporary files of low priority. As with scratch disks, there is no quota on memory. NO BACK-UPS are made for temporary disks, and all contents are purged every 30 days . Top-level files are purged with every new login session .