VERITAS NetBackup 5230 Hardware Installation Manual page 125

Adding 2U12 storage shelves to an operational NetBackup 5230 Appliance 125
Turning on the hardware and verifying operation
4
Locate the LEDs on each I/O module canister.
The LED in the red area with the white X-mark is amber when there is a fault
in the I/O module canister.
The LED in the ID area is blue when each module is identified.
The LED in the green area with a white checkmark is green when functions
are normal.