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Hardware Implementation
2-24
Quantum DLT 4000 Tape Drive
Table 2–8 LED Activity During Density Selection
If…
Then…
The density Select Button
is not used
The lighted LED’s show the actual density when the tape is
being read from and written to. The LED’s light steadily;
Density Override LED remains off.
The density Select Button
is used and the actual
tape density is the same
as the density selected
via the button
The LED’s that reflect the actual density and the Density
Override both are lit. For example, if the actual density is
10.0 GB and 10.0 GB is selected via the Select Button, the
LED next to “10.0” lights.
The density Select Button
is used and the actual
tape density differs from
the density selected via
the button
The LED that reflects the actual density lights steadily. The
LED that reflects the SELECTED density blinks. The Density
Override lights steadily.
For example, if the actual tape density is 10.0 GB and the
selected density is 6.0 GB, the 10.0 LED lights steadily, the
6.0 LED blinks, and the Density Override LED lights steadily.
2.6
POWER ON SELF TEST (POST)
When power is applied to the tape drive, the drive performs a POST. POST
completes in about 15 seconds and the tape drive should respond normally to all
commands; POST is complete after Stage 2 in Table 2-9. However, it might take
longer for the media to become ready.
After a bus reset, the tape drive responds within a bus selection time-out period
(per the ANSI SCSI specification).
The following table lists the sequence of events:
Summary of Contents for DLTtape DLT 4000
Page 1: ...DLT 4000 Tape Drive Product Manual November 10 2003 81 60043 04 ...
Page 5: ...USER MANUAL STATEMENTS FOR CLASS B EQUIPMENT continued ...
Page 6: ......
Page 24: ...About This Manual Quantum DLT 4000 Tape Drive xxiv ...
Page 62: ...Hardware Implementation 2 28 Quantum DLT 4000 Tape Drive ...
Page 100: ...Messages 4 12 Quantum DLT 4000 Tape Drive ...
Page 264: ...SCSI Commands 5 164 Quantum DLT 4000 Tape Drive ...
Page 274: ...Appendix B EEPROM Resident Bugcheck and Event Logs B 6 Quantum DLT 4000 Tape System ...
Page 280: ...Appendix C Updating the Firmware C 6 Quantum DLT 4000 Tape Drive ...
Page 298: ...Index Index 6 Quantum DLT4000 Tape Drive ...
Page 299: ......