1-20 Disk Array Unit Overview
J2 BACKUP LED
(orange)
This LED, when lit, shows that the battery backup unit is charged and on
line to supply power to cache memory in the event of a power failure.
Replacing the controller, power supply, and/or battery backup unit while
the BACKUP LED is lit, loses the data in cache memory.
The battery backup unit supplies power to the cache memory for a
maximum of three days (72 hours in the full-charged condition). After
this time period, cache data may be lost.
J3 ACCESS LED
(green)
The ACCESS LED blinks while the controller is in operation.
J4 READY LED
(green)
The READY LED lights green while the controller operates normally.
The LED blinks during the self-test or initialization, just after power-on.
K LINKUP LED
(MATE-LINK)
This LED lights green if the other controller in the DAU becomes
operable (links up). This LED is off during the self-test or initialization,
just after power-on.
L HOST-2G LED The HOST-2G LED lights green while the FC interface with host is
operating at 2Gbps.
M DE 2G LED The DE 2G LED lights green while the FC interface with Disk Enclosure
is operating at 2Gbps.
N FC connector (for
connection with
disk enclosure)
(DE-FC)
This connector is used to connect the Disk Array unit to the Disk
Enclosure (DE).
Figure 1-10. Controller Features and Indicators
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