Cx/ex/slotx show identify, Cx/ex/slotx set identify=on|off, Cx/e – Avago Technologies 3ware SAS 9750-4i User Manual
Page 136: Slot, Show identify, Set identify=on|off

Chapter 2. CLI Syntax Reference
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3ware SATA+SAS RAID Controller Card CLI Guide, Version 10.0
a dash (-) is shown in the Port column. The final column shows the Identify
setting for the specified slot.
Example:
//localhost> /c0/e0/slot1 show
Slot Status Port Identify
----------------------------------------------------
slot1 OK /c0/p1 Yes
/cx/e
x
/slot
x
show identify
This command is used with 9750 and 9690SA controllers. For the 9650SE,
simply drop the prepended controller name in the command and use /ex.
This command shows the identify status of the specified slot. The status can
be either on or off. If identify is on, the LED associated with the slot will
blink. If the enclosure does not support Slot Identify, this command will
return N/A.
Example:
//localhost> /c0/e0/slot1 show identify
/c0/e0/slot1 Identify status = on
/c
x
/e
x
/slot
x
set identify=on|off
This command is used with 9750 and 9690SA controllers. For the 9650SE,
simply drop the prepended controller name in the command and use /ex.
If the enclosure supports Slot Identify, this command identifies the specified
slot by blinking the LED associated with it, or turns off identification of the
LED for this slot.
Setting identify to on will cause the LED associated with that slot to blink.
Note:
This command is equivalent to “/cx/px set identify=on|off” on
Example:
//localhost> /c0/e0/slot1 set identify=on
Setting Slot Identify /c0/e0/slot0 to [on] ... Done.