Dell EMC ME4 Series - Page 29

Table 8. LEDs: ME4 Series SAS controller module
LED Description Denition
1
Host 12 Gb SAS
1-2
Link Status/
Link Activity
Green — The port is connected and the link is up.
Amber — Partial link exists (one or more lanes down).
Blinking green or amber — Host link activity is detected.
2 OK
Green — The controller is operating normally.
Blinking green — System is booting.
O — The controller module is not OK, or is powered o.
3 Fault
O — The controller is operating normally.
Amber — A fault has been detected or a service action is required.
Blinking amber — Hardware-controlled power-up or a cache ush or restore error.
4 OK to remove
O — The controller is not prepared for removal.
Blue — The controller module is prepared for removal.
5 Identify White — The controller module is being identied.
6 Cache status
3
Green — Cache is dirty (contains unwritten data) and operation is normal.
The unwritten information can be log or debug data that remains in the cache, so a green cache
status LED does not, by itself, indicate that any user data is at risk or that any action is necessary.
O — In a working controller, cache is clean (contains no unwritten data).
This is an occasional condition that occurs while the system is booting.
Blinking green — A CompactFlash ush or cache self-refresh is in progress, indicating cache
activity.
See also Table 9. Cache Status LED – power on behavior.
7 Network Port Activity Status
4
O — The Ethernet link is not established, or the link is down.
Green — The Ethernet link is up (applies to all negotiated link speeds).
8 Network Port Link Speed
4
O — Link is up at 10/100base-T negotiated speeds.
Amber — Link is up and negotiated at 1000base-T.
9 Expansion Port Status Green — The port is connected and the link is up.
1
-Cables must be qualied HD mini-SAS cable options.
2
-Use a qualied SFF-8644 to SFF-8644 cable option when connecting the controller to a 12Gb SAS HBA.
3
-Cache Status LED supports power on behavior and operational (cache status) behavior. See also Table 9. Cache Status LED – power on
behavior.
4
–When port is down, both LEDs are o. See also Power on/o behavior
5
-Once a Link Status LED is lit, it remains so, even if the controller is shut down using the ME Storage Manager or the CLI.
Storage system hardware
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