Read Buffer Command (3Ch) - Quantum DLT 8000 Product Manual

5.16 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. In addition, by using buffers 1 and 2, the READ
BUFFER command allows the contents of the tape system's local RAM/EEPROM, and
DRAM to be transferred over the SCSI bus. Buffers 1 and 2 provide a diagnostic
capability for the system's firmware.
Bit 7
Byte
0
1 Logical Unit Number
2
(MSB)
3 - 5
(MSB)
6 - 8
9 Unused
Figure 5–74 READ BUFFER Command Descriptor Block — Data Format
6 5
Operation Code (3Ch)
Allocation Length
Quantum DLT 8000 Tape System
)
4 3
Reserved
Buffer ID
Buffer Offset
Reserved
SCSI Commands
2 1
Mode
Flag
0
(LSB)
(LSB)
Link
5-165