The DE460C drive shelf is a high-density SAS-3 (12 Gb/s) enclosure. It can contain a maximum of 60 high-capacity 3.5-inch SAS drives or high-performance 2.5-inch SAS drives. It is the same as the E2860 controller shelf. However, instead of controllers, the DE460C drive shelf has two I/O modules (IOMs).
The following figure shows the back of a DE460C drive shelf:
