ADIC DS9000 Series - Manual (Page 30)

18 Operation and Maintenance
Power-on Self-Test
When the system power is ON, the DLT drive performs a Power-on Self-Test (POST). The sequence of events is as
follows:
1. The LEDs on the right front panel of the DLT drive will turn on sequentially from top to bottom. All LEDs
will remain ON for a few seconds.
2. The LEDs on the left front panel will turn ON at the same time for about three seconds and then turn OFF.
3. The Operate Handle, Write Protected, and Use Cleaning Tape LEDs will turn OFF. The Tape in
Use LED will blink while the tape drive initializes.

If the external SCSI bus terminator has a Term Power LED it should also be illuminated.
Drive Status
LED Indicators
After initialization, the drive will be in one of the four states listed in the following table:
Drive State LED Indicator Displays and Drive Actions
1. No cartridge is present. A. The Tape in Use LED turns OFF.
B. The Operate Handle LED turns ON.
C. The handle is unlatched.
D. The drive beeps momentarily.
2. A cartridge is present and the
handle is down. The drive loads the cartridge.
When the Tape in Use LED stops blinking and stays ON, the
tape’s actual density lights. For example, if the actual tape density
is 2.6, then the LED turns ON next to the 2.6 label.
When the Density Override LED blinks, select a density setting.
The drive is ready for use.
3. A cartridge is present, but the
handle is up (not
recommended
).
The Tape in Use LED turns OFF. The Operate Handle LED
flashes.
When the handle is lowered, the cartridge loads.
4. The drive detects an error
condition. All right or left side LEDs blink repeatedly.
Try to unload the tape (if present) and reinitialize the drive by
pressing the Unload button or switch the power OFF and then
ON
. The right or left side LEDs stop blinking and the drive tries
to reinitialize. The LEDs turn ON with a constant illumination,
and then turn OFF if the test succeeds.