General Description 2-17

1PCI module (for group 1)

A module that includes a PCI board and LAN controller.

2PCI module (for group 2)

A module that includes a PCI board and LAN controller.

3CPU module (for group 1)

A module that includes a CPU (processor) and memory (DIMM).

4CPU module (for group 2)

A module that includes a CPU (processor) and memory (DIMM).

5POWER switch

A switch for turning on/off power to the system. The POWER switch on the primary PCI module will be lit. Press it once to turn on power. Press it again to turn off power. Depress the switch for more than four seconds to force the system to power down. The POWER switch on the secondary PCI module will be unlit and will not respond until a failure in the primary PCI module causes the secondary PCI module to assume primary functionality.

6CD-ROM drive

Used for reading data from CD-ROMs.

Although there are two CD-ROM drives, only the one on the active primary PCI module can be used (the module with the lit POWER Switch LED).

73.5-inch hard disk drive bay

Slots for adding hard disks. On a tower model, they are called Slots 1, 2, and 3 from the bottom. On a rack-mount model, they are called Slots 1, 2, and 3 from the left. Slots of the same number are mirrored between the groups 1 and 2.

8DUMP switch

A switch for outputting a memory image from the kernel to a file.

9DISK LED (green/amber)

An LED on the hard disk. Blinks in green while the hard disk is accessed and turns amber when operating in simplex mode. If one of the mirrored hard disks fails, the failed disk’s LED turns green and the other disk’s LED turns amber.

CD-ROM Drive

1Status LED

An LED that stays on while the loaded CD-ROM is accessed.

2CD tray eject button

A button for ejecting the CD tray.

3Manual release hole

When the eject button does not work, insert a metal pin into this hole to forcefully eject the CD tray.