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Table 2 shows specific combinations of LEDs that may
occur during tape drive operation. You may occasionally
observe LED combinations and sequences not described
in Table 2. These other combinations represent special or
unusual conditions that are beyond the scope of this
table. (For example, a fairly complex LED sequence
occurs when you load new microcode from tape.)
Tape Drive
State
LEDs
( =On =Off = Flashing
a
)
Amber LED Green LED
POST
b
■■
POST (passed)
c
Ready (tape loaded) ■
Normal tape motion
■ or
d
slow
High-speed search/rewind fast
Servo error
e
■ or or four s then
CRC fail
f
slow ■ or
Unrecoverable fault
f
Failed POST
fast
Unload button fail ■ or
a
Slow flash = 1 flash/second (0.94 Hz).
Fast flash = 4 flashes/second (3.76 Hz).
b
The tape drive is performing power-on self-test diagnostics. This takes
about
65 seconds.
c
The green LED may go off before the amber LED if no tape is loaded.
d
The amber LED is on (■) during data transfer over the SCSI bus.
The amber LED is off (
) when no data transfer is occurring. The
combination of on and off may appear as an irregular flash.
e
Refer to page 27 for information about clearing servo errors.
f
CRC failures occur only within the first two seconds after a power-on reset.
An unrecoverable fault can occur anytime during operation.
Table 2 Tape drive states indicated by the LEDs
24 EXB-8500/EXB-8500c 306261