Single-character Display (SCD)
The Single-character Display (SCD) (3 in Figure D-1 on page D-1) presents a
single-character code for:
v Error conditions and informational messages
v Diagnostic or maintenance functions (while in maintenance mode only)
“Drive Error Codes” on page D-41 lists the codes for error conditions and
informational messages. If multiple errors occur, the code with the highest priority
(represented by the lowest number) displays first. When the error is corrected, the
code with the next highest priority displays, and so on until no errors remain.
“Diagnostic and Maintenance Functions” on page D-26 lists the single-character
codes that represent diagnostic or maintenance functions. To initiate a function the
unit must be in maintenance mode.
The SCD is blank during normal operation.
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 (4 in Figure D-1 on page D-1).
To copy the dump, see “Diagnostic and Maintenance Functions” on page D-26.
The SCD Dot is ON solid if the dump is in ROM memory. The SCD Dot flashes if
the dump is in FLASH memory.
The SCD Dot turns OFF when you obtain a dump (by using ITDT, a library
command, or a SCSI command) or update the drive firmware.
Note: If the drive dump is stored in ROM memory (SCD Dot ON solid), the dump
will be lost when you turn OFF the power or reset the drive.
Status Light
The Status Light (1 in Figure D-1 on page D-1) 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 D-1 lists the conditions of the Status
Light and Single-character Display (SCD) and provides an explanation of what
each condition means.
Table D-1. 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 may take up to ten minutes).
The light stops blinking and becomes solid when the drive completes the recovery and is
ready for a read or write operation. To eject the cartridge, press the unload button.
Flashing
Amber
Displaying
Error Code
The drive is displaying error code(s) from the error code log on the SCD. For more
information, see “Diagnostic and Maintenance Functions” on page D-26.
D-2 TS3310 Tape Library Maintenance Information
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