IBM TotalStorage DS4100, Installation, User'S, And Maintenance Manual

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Table 13. RAID controller LEDs
Icon LED Color Operating states
1
Fault Amber
v
Off - Normal operation.
v
On - One of the following situations has
occurred:
– The RAID controller has failed.
– The RAID controller was placed offline
– The controller battery had failed (in
conjunction with the battery LED in off
state).
Host loop Green
v On - Normal operation.
v Off - One of the following situations has
occurred:
– The host loop is down, not turned on,
or not connected.
– A SFP has failed, or the host port is not
occupied.
– The RAID controller circuitry has failed,
or the RAID controller has no power.
Cache active Green
v On - There is data in the RAID controller
cache.
v
Off - One of the following situations has
occurred:
– There is no data in cache.
– There are no cache options selected for
this array.
– The cache memory has failed, or the
battery has failed.
+
Battery Green
v
On - Normal operation.
v Flashing - The battery is recharging or
performing a self-test.
v
Off - The battery or battery charger has
failed.
Controller
fault
Expansion
by-pass
Expansion
10BT
2Gb/s
2Gb/s
10101
100BT
Battery
charging
Expansion link indicator
Cache
active
10BT 100BT
Host 1
Host 1
indicator
Host 2
indicator
Host 2
+
2Gbps
f10ug025
Figure 58. RAID controller LEDs
Chapter 4. Operating the storage server
73