HP 3PAR StoreServ Concepts Guide: HP 3PAR OS 3.1.3

Physical Disks
A physical disk is a hard drive mounted on a drive magazine or module located in drive cages in
HP 3PAR storage systems. There are three types of physical disks: FC, NL, and SSD.
In DC4 drive cages, each drive magazine holds four disks numbered 0 through 3 from the rear
to the front of the magazine. The DC4 drive cages contain a maximum of ten drive magazines for
a maximum of 40 physical disks in each drive cage. See Figure 15 (page 66).
Figure 15 DC4 Drive Magazine with Physical Disks
1. Front of drive magazine
2. Rear of drive magazine
In a DC3 drive cage, each plug-in drive module holds a single disk numbered 0 through 15. The
DC3 drive cage contains 16 drive bays and holds up to 16 drive magazine modules for a maximum
of 16 physical disks in each drive cage. See Figure 16 (page 66).
Figure 16 DC3 Drive Magazine Module with One Physical Disk
66 HP 3PAR Storage System Hardware