Activity LED (Green) Fault LED (Amber) Status/condition*
Blink o with activity Blinking: 3s on/ 1s o Storage system: Oine (dequarantined)
Blink o with activity O Storage system: Reconstruction
Blink o with activity O Processing I/O (whether from host or
internal activity)
*If multiple conditions occur simultaneously, the LED state behaves as indicated by the condition listed earliest in the table, as rows are
read from top to bottom.
IOM LEDs
IOM LEDs pertain to controller modules and expansion modules, respectively. Expansion enclosures are supported for optionally adding
storage.
Expansion module LEDs
Expansion IOM status is monitored by the LEDs located on the face plate. See Figure 17. Expansion module detail ME412/ME424/ME484.
LED behaviors for expansion enclosures are described in . For actions pertaining to Table 9. Cache Status LED – power on behavior or Table
14. Expansion module LED states, see Actions.
Table 14. Expansion module LED states
CRU OK
(Green)
CRU Fault
(Amber)
External host port activity
(Green)
Status
On O Controller module OK
O On Controller module fault – see Replacing an IOM
O No external host port connection
On HD mini-SAS port connection – no activity
Blinking HD mini-SAS port connection – activity
Blinking EBOD VPD error
5U enclosure LEDs
NOTE
: When the 5U84 enclosure is powered on, all LEDs turn on for a short period to ensure they are working. This behavior
does not indicate a fault unless LEDs remain lit after several seconds.
PSU LEDs
See Power supply unit (PSU) for a visual description of the Power Supply Unit (PSU) module faceplate.
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Troubleshooting and problem solving
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