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SCSI Commands
5-122 Quantum DLT 4000 Tape Drive
5.14 READ BUFFER COMMAND (3CH)
The READ BUFFER command is used in conjunction with WRITE BUFFER as a
diagnostic function for testing the drive’s data buffer for possible diagnostic data
and for checking the integrity of the SCSI bus.
Bit
Byte
7 6 5 4 3 2 1 0
0 Operation Code (3Ch)
1 Logical Unit Number Reserved Mode
2 Buffer ID
3 - 5
(MSB)
Buffer Offset
(LSB)
6 - 8
(MSB)
Allocation Length
(LSB)
9 Unused Reserved Flag Link
Figure 5–59 READ BUFFER Command Descriptor Block - Data Format
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