IBM R30 Operator's Manual page 59

Status Lights on the 4.0GB 4 mm Tape Drive
Status
LED test.
The power-on self-test (POST) is running or
the Diagnostic Cartridge is running.
One of the following has occurred:
The power is off.
The POST has completed successfully,
but no tape cartridge has been loaded.
A tape cartridge has been inserted and
the 4 mm tape drive is ready to receive
commands from the system.
The tape is in motion and the 4 mm tape drive
is running a device operation or cleaning.
The 4 mm tape drive has detected an internal
fault that requires corrective action such as tape
cartridge failure, high humidity, or no SCSI
terminator. Refer to the service guide or contact
your service representative. (See note below)
The tape path requires cleaning or a poor
quality tape cartridge is being used. See
"Cleaning the Tape Path on the 4.0GB 4 mm
Tape Drive" on page 2-42.
Note: If a fault or an error condition occurs, first try to recover by pressing the unload
button. If this does not correct the fault, switch off the power to the 4 mm tape
drive and then switch on the power to the drive. If the condition continues, call
your service representative.
Ready Read-Write
(green) (green)
On 2 seconds On 2 seconds
at power on at power on
Flashing Off
Off Off
Off
On
On Flashing
Off Off
Off
Off
or
or
On Flashing
Using the CPU-Media Enclosure
Disturbance
(amber)
On 2 seconds
at power on
Off
Off
Off
Off
Flashing
On
2-39