How is the /home file system structured?
The /home file systems (there is actually two of them, but they are both called /home) is the main area where users of the Sun Fire cluster keep their data. Each user’s home directory resides there, and is called /home/hpcXXXX where hpcXXXX denotes the user name. Physically, this file system resides in 3 racks containing approximately 160 TB of RAW disk space in the form of 46 Sun StorageTek 3410 FC units. The building blocks of the file system consist of many RAID 5 logical volumes later mapped as LUN’s to the SAM-QFS host. This configuration is designed to tolerate the failure of multiple disks without the loss of data or disruption in service. This is achieved with the implementation of a “global spare” pool of disks. When a member drive from any of the logical drive fails, the global spare drive joings the logical drive and automatically starts to rebuild. Logically, the file system is a SAM-QFS file system which is a feature of the Sun Performance Suite (QFS) and the Sun Utilizati
