Owners Manual

Table 8. ME4 Series SAS controller module LEDs
LE
D
Description Definition
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.
● Off—The controller module is not OK, or is powered off.
3 Fault
● Off—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 flush or restore error.
4 OK to remove
● Off—The controller is not prepared for removal.
● Blue—The controller module is prepared for removal.
5 Identify White—The controller module is being identified.
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.
● 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.
7 Network Port Activity
Status
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).
8 Network Port Link Speed
4
● Off—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 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 Cache Status LED – power
on behavior on page 28.
4
When port is down, both LEDs are off. See also Power on/off behavior on page 27.
5
Once a Link Status LED is lit, it remains so, even if the controller is shut down using the PowerVault 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.
Storage system hardware
27