SCD dot
If a drive dump is present while the drive is in maintenance mode, a single red dot illuminates in the lower
right corner of the SCD. To download the drive dump, see “Locating Management functions” on page 79 or
“IBM Tape Diagnostic tool (ITDT)” on page 112.
The SCD dot turns OFF when you obtain a dump or update the drive rmware.
Note: If the drive dump is stored in ROM memory (SCD dot ON solid), the dump is lost when you turn OFF
the power or reset the drive.
Status light
The Status light is a light-emitting diode (LED) that provides information about the state of the drive. The
light can be green or amber, and (when lit) solid or flashing. Table 50 on page 147 lists the conditions of
the Status light and single-character display (SCD) and provides an explanation of what each condition
means.
Table 50. Meaning of Status light and single-character display (SCD)
If the
Status
light is...
And the
SCD is...
Meaning
OFF OFF The drive has no power or is powered OFF.
Green OFF The drive is powered ON and in an idle state.
Flashing
green
OFF The drive is reading from the tape, writing to the tape, rewinding the tape, locating data
on the tape, loading the tape, or unloading the tape.
Flashing
green
OFF The drive contains a cartridge during the power-ON cycle. In this case, the drive
completes POST and slowly rewinds the tape (the process can take up to ten minutes).
The light stops flashing and becomes solid when the drive completes the recovery and
is ready for a read or write operation.
Flashing
amber
Displayin
g error
code
The drive is displaying error codes from the error code log on the SCD.
Amber Red
numbers,
letters, or
segment
s
During the power-on/initialization and POST (power-on self-test), the SCD briefly
displays , then becomes blank (not lit) when POST is complete and no POST errors
occur. If a POST error is detected, an error code is displayed in the SCD and the Status
light flashes amber.
Amber Flashing The drive is exiting from maintenance mode.
Amber Flashing
function
The drive is running the maintenance function.
Flashing
amber
once per
second
Displayin
g error
code
An error occurred and the drive or media might require service, or it might require
cleaning.
Flashing
amber
once per
second
Displayin
g
The drive needs cleaning.
IBM Condential
Chapter 5. Troubleshooting147
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