DLT1/VS80 SCSI Interface Guide
81-81276-01 Rev A01
July 2004
4-121
4.26 WRITE BUFFER (3Bh)
The WRITE BUFFER command, used with READ BUFFER, is a diagnostic function for testing the
tape drive data buffer, DMA engine, SCSI bus interface hardware, and SCSI bus integrity. It also
enables downloading and updating firmware.
Figure 4-78.
WRITE BUFFER (3Bh) Command Descriptor Block — Data Format
Bit
Byte
7
6
5
4
3
2
1
0
0
Operation Code (3Bh)
1
Logical Unit Number
Reserved
Mode
2
Buffer ID (00h)
3 - 5
(MSB)
Buffer Offset (000000h)
(LSB)
6 - 8
(MSB)
Parameter List / Data Length
(LSB)
9
Unused
Reserved
Flag
Link
Table 4-71.
WRITE BUFFER (3Bh) Command Descriptor Block — Field Descriptions
Field Name
Description
LUN
Logical Unit Number. The target ignores this field. Only an IDENTIFY message
can change the LUN.
Mode
The tape drive supports the following values within the field. If any other value is
set, the tape drive terminates the command with a CHECK CONDITION status
and an ILLEGAL REQUEST Sense Key.
Mode
Description
000b
Write combined header and data
010b
Write Data
100b
Download Microcode
101b
Download Microcde and Save
Summary of Contents for DLT1/VS80 SCSI
Page 1: ...DLT1 VS80 SCSI Interface Guide...
Page 6: ...DLT1 VS80 SCSI Interface Guide vi July 2004 81 81276 01 Rev A01 Notes...
Page 12: ...Table of Contents xii July 2004 81 81276 01 Rev A01 Notes...
Page 16: ...List of Figures xiv July 2004 81 81276 01 Rev A01 Notes...
Page 20: ...List of Tables xviii July 2004 81 81276 01 Rev A01 Notes...
Page 24: ...Chapter 1 Introduction 1 4 July 2004 81 81276 01 Rev A01 Notes...
Page 32: ...Chapter 2 General SCSI Bus Operation 2 8 July 2004 81 81276 01 Rev A01 Notes...
Page 42: ...Chapter 3 SCSI Messages 3 10 July 2004 81 81276 01 Rev A01 Notes...
Page 181: ......
