Hitachi AMS 2100, Hardware Manual

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Hardware components
4–35
Hitachi AMS 2100/2300 Storage System Hardware Guide
Table 4-28: Modular 2U SAS expansion unitpower supply LEDs
Modular 2U SAS expansion unit ENC unit
The ENC unit is mounted in the expansion unit. It is the interface between
the expansion unit in which it is mounted and the controller in a base unit
or the ENC unit in another expansion unit. The ENC unit is shown in
Figure 4-28 .
Figure 4-28: Modular 2U SAS expansion unit ENC Unit
Table 4-29:
Modular 2U SAS expansion unit ENC Unit
No. LED Function
1
ALM LED (red)
ON: An abnormal or stop
state.
2
RDY LED (green) ON: Operating normally.
3
AC IN (green) ON: AC input is normal.
No. LED Function
3
LOCATE LED (orange)
The following blinking is fast
because ENC microprogram
detects CUDG error:
High-speed blinking
Twice: ENC hard error
Three times: Microprogram
error in flash memory
Not blinking: Boot section
error of ENC microprogram,
RAM error or ENC hard
configuration error.
4
ALARM LED (red)
ON: A failure has occurred in
the ENC unit and it is
inoperable
5
POWER LED (green)
ON: Power is supplied to the
unit
6
PATH0 (in) side LED (green) ON: The IN side is linked up
7
PATH0 (out) side LED
(green)
ON: The OUT side is linked up