Chapter 3 Using Your Tape Drive
Power-On Self-Test (POST) Troubleshooting
SDLT 600A Product Manual
49
See
figure 36
to help familiarize yourself with the LEDs on the front
panel. Stage 3 in the following table provides the sequence of operations
to expect when power is turned on.
Table 3 LED Lighting Pattern
During Power-On Self-Test
(POST)
Stage
What You Observe
1 (Power
On)
All LEDs illuminate for approximately one second.
2
The LEDs flash on, then off in a progressing pattern from
left to right. Stages 1 and 2 generally complete within
approximately five seconds.
3
The right LEDs remain off, the left LED illuminates
steadily, and the middle LED flashes until POST
completes. This stage typically lasts for 5 to 10 seconds.
4
When POST is complete, the middle LED stops flashing
and remains illuminated; the left LED turns off, and right
LED remains off.
POST
Failure
If POST fails, the middle and right LEDs illuminate
steadily and the left LED flashes.
Note:
If a data cartridge is in place when power is turned on, all
stages remain the same except stage 3. It may take a
considerably longer time for stage 3 to complete due to tape
rewind and searching operations that occur during that stage.
