Switches On The Front Side; Indicator Elements On The Front Side - Cisco C880 M4 Operating Manual

3.1. Switches on the Front Side

There are three switches on the front side. They are available after taking off the bezel only and should not
be used by the customer.
DC-ON switch (pushbutton) / AutoPower / MODE_SEL
The switches should not be used by the customer (they are behind the bezel). In the default
settings, the storage subsystem powers ON/OFF automatically with the data host.
Default Operation
setting
Yes Power ON: SAS signal detected
Power OFF: SAS signal not detected
No*
Power ON: AC-ON and SAS signal d etected
Power OFF: AC-OFF
No* Power ON: DC-ON Switch
Power OFF: DC-ON Switch for more than 4 sec
and SAS signal not detected
No* Power ON: AC-ON
Power OFF: AC-OFF or DC-ON Switch for
more than 4 sec"
*: for service personnel and error diagnostics only

3.2. Indicator Elements on the Front Side

You can see the following on the front side of the storage subsystem:
–
the four operating status LEDs which indicate the power supply, the ready status, the fault status and
the identification. The fifth LED (CACHE LED) is covered by the bezel.
–
Status LEDs of the hard disk drives
There is a Ready LED and a Fault LED for each of the 24 possible hard disk drives.
12 Operating Manual
3.1Switches on the Front Side
MODE_SEL AutoPower
Off=down Off=down
On=Up On=up
ON OFF
ON ON
OFF OFF
OFF ON