Dell EMC ME4084 Owner's Manual page 25

LED Description
4 OK to remove
5 Identify
3
6 Cache status
7 Network Port Activity Status
8 Network Port Link Speed
9 Expansion Port Status
1
Cables must be qualified HD mini-SAS cable options.
2
Use a qualified 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
behavior.
4
When port is down, both LEDs are off. See also
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.
When a controller is shut down or otherwise rendered inactive—its Link Status LED remains illuminated— falsely indicating that the
controller can communicate with the host. Though a link exists between the host and the chip on the controller, the controller is not
communicating with the chip. To reset the LED, the controller must be power-cycled.
Cache status LED details
This section describes the behavior of the LEDs during powering on and off and cache status behavior.
Power on/off behavior
During power on, discrete sequencing for power on display states of internal components is reflected by blinking patterns displayed by the
Cache Status LED.
Table 9. Cache Status LED – power on behavior
Item Display states reported by Cache Status LED during power on sequence
Display state 0
Component VP
Blink pattern On 1/Off 7
Once the enclosure has completed the power on sequence, the Cache Status LED displays Solid/On (Normal), before assuming the
operating state for cache purposes.
Definition
Blinking amber — Hardware-controlled power-up or a cache flush or restore error.
Off — The controller is not prepared for removal.
Blue — The controller module is prepared for removal.
White — The controller module is being identified.
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.
Off — 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 flush or cache self-refresh is in progress, indicating cache
activity.
4
Off — The Ethernet link is not established, or the link is down.
Green — The Ethernet link is up (applies to all negotiated link speeds).
4
Off — Link is up at 10/100base-T negotiated speeds.
Amber — Link is up and negotiated at 1000base-T.
Green — The port is connected and the link is up.
Power on/off
1 2
SC SAS BE
On 2/Off 6 On 3/Off 5
behavior.
3 4
ASIC Host
On 4/Off 4 On 5/Off 3
Table 9. Cache Status LED – power on
5 6
Boot Normal
On 6/Off 2 Solid/On
Storage system hardware
7
Reset
Steady
25