SCSI Commands
5-170 Quantum DLT 7000 Tape System
5.26 WRITE BUFFER COMMAND (3Bh)The WRITE BUFFER command is used with READ BUFFER as a diagnostic
function for testing the device data buffer, DMA engine, SCSI bus interface
hardware, and SCSI bus integrity. It is also used for downloading and updating
DLT microcode (firmware).
Bit
Byte
76543210
0Operation Code (3Bh)
1Logical Unit Number Reserved Mode
2Buffer ID (00h)
3 - 5
(MSB)
Buffer Offset
(LSB)
6 - 8
(MSB)
Parameter List / Data Length
(LSB)
9Unused Reserved Flag Link
Figure 5–82 WRITE BUFFER Command Descriptor Block - Data Format