NEC EXP320J, User Manual, Page: 460 / 504

8-6 System Upgrade
3.5-INCH HARD DISK DRIVE
The 3.5-inch hard disk drive bay in front of the server contains six slots in which hard disks with the
SAS interface are installed.
IMPORTANT:
Do not use any hard disks that are not authorized by NEC. Installing a third-party hard disk may
cause a failure of the server as well as the hard disk. Purchase hard disks of the same model in pair.
Contact your sales agent for hard disk drives optimum for your server.
You can install 25.4mm (1-inch) high hard disk drives to six 3.5-inch hard disk drive bays on the
server.
The hard disk drives installed on the slot 1, 2, and 3 of the CPU/IO module 0 and 1 are mirrored
respectively. (The OS is installed on the mirror volumes that consist of the hard disks in the slot 1.)
Empty slots in the 3.5-inch hard disk drive bay contain dummy trays. The dummy trays are inserted to
improve the cooling effect within the device. Always insert the dummy trays in the slots in which hard
disks are not installed.
Slots to execute the mirroring process
Slot 2
Slot 1
Slot 3
Slot 2
Slot 1
Slot 3