Disk Drive Status Leds - Compaq AlphaServer ES45 1B Owner's Manual

4.13.1 Disk Drive Status LEDs

Three LEDs are located on the front of the disk drive carrier: a Drive
Activity LED, an On-Line LED, and a Drive Failure LED. Figure 4–20
shows the location of the LEDs and Table 4–1 explains the status LED
displays.
Figure 4–20 Location of Drive Status LEDs
LEDs
Drive Activ-
ity LED
(Green)
On-Line LED
(Green)
MR0045
Drive Failure
LED
(Amber)
Configuring and Installing Components
Depending on the host con-
troller, this LED can either
flash by itself or in unison
with the On-Line LED when
there is SCSI bus activity.
This LED is off when there
is no bus activity.
When the +5 VDC is avail-
able and the disk is properly
installed, this LED is on.
Otherwise, it is off. Depend-
ing on the host controller,
this LED can either flash by
itself or in unison with the
Drive Activity LED when
there is SCSI bus activity.
Depending on the host con-
troller, this LED can flash
when an error condition is
detected by the controller.
4-41