Figure 64. 12Gb/s SAS JBOD Module Connectors and Indicators (5U enclosures) (viewed from rear of enclosure)
For the detailed information of ESM LEDs status, refer to the following table.
Table 18. ESM LED Status
ESM OK (Green) ESM Fault (Amber) External Host Port
Activity (Green)
Status
On Off ESM OK
Off On ESM fault. For replacement
procedure see “Replacing
ESMs” on page 92.
Off
No external host port
connection
On External host port
connection - no activity
Flashing External host port
connection - activity
Flashing
ESM VPD error
Temperature Sensors
Temperature sensors throughout the enclosure and its components monitor the thermal health of the storage
system. Exceeding the limits of critical values will cause a notification to occur.
Troubleshooting (2U Enclosures)
The following sections describe common problems which can occur with your enclosure system and some
possible solutions. For all of the problems listed in Table 19 “Alarm Conditions ” on page 62, the module fault
LED on the Ops panel (Figure 24 “580W PCM LEDs ” on page 22) will light amber to indicate a fault.
Table 19. Alarm Conditions
Status Severity OPs Panel LED
PCM alert - loss of DC power from a
single PCM
Fault - no loss of redundancy Module Fault
PCM alert - loss of DC power from a
single PCM
Fault - loss of redundancy Module Fault
PCM fan fall Fault - loss of redundancy Module Fault
ESM detected PCM fault Fault Module Fault
PCM removed Configuration error Module Fault
62 Lenovo Storage D1212/D1224/D3284Hardware Installation and Maintenance Guide
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