Hitachi AMS 2000 Series Service Manual page 71

Base unit power receptacles
Each power supply contains a power receptacle that must be connected to
a working AC power source using the supplied AC power cable.
NOTE: Hitachi Data Systems recommends that each power supply in the
base unit be connected to a different AC source in the rack. If one source
fails, the other source continues to supply power to the other power supply.
This keeps the array running until power is restored to the failed source.
Disk drive status LEDs
The AMS 2100/2300 base units and expansion unit each have two LEDs that
are built into the unit chassis above each disk drive slot. These LEDS, shown
in Figure 1-27, indicate the status of the drive that is installed in the slot
below them.
in
NOTE: The AMS 2500 base unit does not contain disk drives.
Figure 1-27: Disk Drive Status LEDs
Table 1-18: Disk Drive Status LEDs
Item Description
ALarM LED ((RED)
Lights when the drive has a
1
serious error in the disk drive,
and the disk drive is unusable.
Hitachi AMS 2000 Family Storage System Service Guide
Item
ACTive LED
Lights or flashes when the drive is
2
operating and is being read from or
written to. It indicates that the disk
drive is operational.
Introduction
Description
(GREEN)
1–31