HP StorageWorks 6000 - Virtual Library System User Manual page 255

Item Description
2 Disk array ID display (not used)
3 Unit identification button. Temporarily illuminates the blue LED on all the drives in the disk array.
4 Disk array monitor status LED (not used)
5 Disk array fault LED (not used)
6 Disk array power button
7 Power supply 0 LED
8 Power supply 1 LED
9 Controller module LED
10 Fan module 0 LED
11 Fan module 1 LED
HP StorageWorks 255