Exabyte EXB-8505 8mm - Manual (Page 80)

Effect of PREVENT/ALLOW MEDIUM REMOVAL Command
If an initiator has issued a PREVENT MEDIUM REMOVAL (1Eh)
command to prevent the removal of the data cartridge, the tape drive
will not eject the data cartridge until the initiator sends an ALLOW
MEDIUM REMOVAL (1Eh) command to allow you to remove the
data cartridge.
For more information about using the PREVENT/ALLOW MEDIUM
REMOVAL command, see the EXB-8205 and EXB-8505 SCSI Reference.
Error During Unload Procedure
If an error exists before or during the unload procedure, the tape
drive suspends the preceding sequence of events and the top amber
LED will flash. If you press the unload button again, the tape drive
reattempts the unload sequence; however, the tape drive does not
write data in the buffer to tape. The tape drive clears the buffer and
errors.
Resetting the Tape Drive
You can reset the tape drive by any of the following methods:
Powering the tape drive off and back on again (power-on reset).
Sending an RST pulse on the SCSI bus for a minimum of 25
µ
sec
(SCSI bus or “hard” reset). A SCSI bus reset immediately clears all
devices from the bus and resets their associated equipment.
Issuing a Bus Device Reset (0Ch) message to the tape drive
(device or message reset). A device reset clears the tape drive
from the bus and causes all commands to be cleared.
Pressing the unload button to clear a servo error.
Note: If a SCSI bus or device reset occurs during a power-on reset,
the tape drive will perform a full power-on reset.
If the tape drive has a data cartridge inserted or loaded when a reset
condition occurs, it rewinds the tape and positions to LBOT after the
reset operation is complete. The total time required for the reset may
be as long as three minutes if the tape is positioned near the end of
tape.
4-16 EXB-8205 and EXB-8505 510504
(Standard and XL)
4 Requirements for Use