Number Item Description
12 ALM LED Red: Power supply unit can
be replaced.
13 AC IN LED Green: Normal operation.
14 RDY1 LED Green: Normal operation.
15 RDY2 LED Green: Normal operation.
AC power supply unit LEDs and connectors
SFF drive trays are equipped with AC power supply units. The AC power supply units include
LEDs to display its operating status.
Number Item Description
1 RDY2 LED Green: Normal operation.
2 RDY1 LED Green: Normal operation.
3 Receptacle Connects to the power cable
provided with the storage
system.
4 AC IN LED Green: Normal operation.
5 ALM LED Red: Power supply unit can
be replaced.
Large form-factor drive tray (DBLE)
The following describes the physical specifications of the large form-factor drive tray.
AC power supply unit LEDs and connectors
Chapter 2: Hardware overview
Hitachi Virtual Storage Platform E590 and E790 Hardware Reference Guide 31
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