DLT2000 SCSI Interface
8-126 DLT2000/DLT2700 Cartridge Tape Subsystem
8.4.26 WRITE BUFFER (3Bh)
Bit
7
6
5
4
3
2
1
0
0
Operation Code (3Bh)
Logical Unit Number
Mode
Buffer ID (00h)
Byte
(MSB)
Buffer Offset (000000h)
(LSB)
(MSB)
Parameter List/Data Length
Unused
Link
Reserved
1
Flag
(LSB)
Reserved
2
3
4
5
6
7
8
9
Figure 8-80 WRITE BUFFER CDB
WRITE BUFFER 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 controller microcode (firmware).
Mode
The drive supports the following values within the field. If any other value is set, the
drive terminates the command with a CHECK CONDITION status and an ILLEGAL
REQUEST sense key set.
Mode
Description
000b
010b
100b
101b
Write combined header and data
Write data
Download Microcode
Download Microcode and Save
Figure 8-81 WRITE BUFFER Modes Supported
For all modes, only a Buffer ID of zero is supported. If the Buffer ID field is nonzero,
the command will be rejected. The target detects and rejects commands that would
overrun the buffer.
Summary of Contents for DLT 2500
Page 18: ...Table of Contents xviii DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem ...
Page 20: ...Revision History xx DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem ...
Page 146: ...Firmware Update From Tape 7 18 DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem ...
Page 291: ...DLT2000 SCSI Interface DLT2000 DLT2700 Cartridge Tape Subsystem 8 145 ...
Page 327: ...Sense Key Information C 6 DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem ...
Page 345: ...Index 8 DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem ...