Hitachi AMS 2100, Руководство по оборудованию

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Hardware components
4–33
Hitachi AMS 2100/2300 Storage System Hardware Guide
Modular 2U SAS expansion unit
A modular 2U SAS expansion unit (factory designation RKAKS) provides
additional storage capabilities for the base units.For the AMS 2100 and the
AMS 2300, this unit can install a maximum of 24 SAS disk drives. An
expansion unit provides additional storage space and can connect the base
unit to additional expansion units or high-density expansion units. The
same expansion unit is used with both base unit models.
An expansion unit contains two redundant power supplies, two ENC
interface units, and from two to 24 disk drives
Modular 2U SAS expansion unit front panel
Figure 4-25 shows the front of an expansion unit (factory designation
RKAKS) with the decorative bezel installed.
The front panel of the expansion unit includes Power and Locate status LEDs
that show the status of the unit and identify the unit. The installation
location should provide an unobstructed view of these LEDs. The function of
the LEDs is shown in Table 4-26 .
Figure 4-25: RKAKS front panel LEDs
Table 4-26:
RKAKS front panel LEDs
Number LED Function
3
READY LED (green)
ON: The subsystem can be
operated.
BLINKING:
High-speed: The internal
processing is executed (even
if the READY LED blinks, the
subsystem is operational.)
Low Speed blinking: The
offline download processing
ended (this is displayed
during the maintenance
work.)
4
POWER LED (green)
ON: Power is supplied to the
subsystem.
5
LOCATE LED (orange)
ON: A failure which does not
stop operation occurred in
the unit. When adding the
chassis with the power
turned on, it indicates the
addition source (this is not an
error).