IBM Slicestor 2584, Installation Manual, Page: 34 / 42

Table 4. Drawer LED states (continued)
Sideplane
OK / power
(green)
Sideplane
fault (amber) Logical fault
(amber) Cable fault
(amber) Activity bar
graph (green)
Status
On On X X X Drive failure has occured causing
loss of availability or redundancy
On X On X X Drive fault (Host indicated)
On X Flashing X X Arrays in impacted state
Off X X On Off Cable fault
On Off Off Off On* Drive activity
*The Activity Bar Graph is a 6-segment drive activity meter, showing activity of the SAS interface to the sideplane.
For zero activity, no segments are lit, scaling linearly until all segments are lit when the interface is transferring data
at full capacity.
X = disregard
Power supply unit (PSU) LEDs
Each PSU has its own indicators.
The following figure shows the LEDs for the power supply.
Table 5. PSU LED states
PSU fail
(amber)
AC fail (amber Power OK (green) Status
Off Off Off No AC power to either PSU
On On Off PSU present but not supplying power
Off Off On Main AC present, switch on; PSU is providing power
output.
Off Off Flashing AC power present, PSU in Standby mode (meaning the
other PSU is currently providing power output)
Flashing Flashing Off PSU firmware download
On On Off PSU alert state, usually due to critical temperature
Off On Off Main AC to this PSU is missing; this PSU is now on
standby, and the other PSU is OK
On On On GEM software lost communication with PSU
On X Off PSU failed.
X = disregard
Figure 18. PSU LEDs
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Slicestor
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2584 Installation Guide