User`s guide

3-5
Monitoring
APC Module LEDs
Each APC module has two LEDs, which are visible from the rear of
the Storage Enclosure, as shown in Figure 3-3:
Figure 3-3 APC Module LEDs
Table 3-3 Drive Carrier LED 2 (Bicolor LED)
Color and Condition of LED 2
a
Green Amber Status Indicated
Off Off No drive present.
On Off Drive present.
Slow blink Off Drive spinning down.
Fast blink Off Drive being identified, or drive
has spun down.
Off Fast blink Drive failed.
a
When Drive Carrier LED 2 is illuminated or blinking, LED 2 on the front panel of
the Storage Enclosure is also illuminated, indicating a shelf fault. (See Table 3-1 on
page 3-3.)
Table 3-4 Drive Carrier LED 3
Drive Status
Interface Spin Up Online I/O Activity
U320 SCSI (SC4100) On Off On (briefly)
FC (FC4100) Blinking On Off (briefly)
SATA (FS4100 or FS4500) Off On Off (briefly)
Green LED = APC OKYellow LED = APC Fault