Chapter 4: SCSI Commands
4-16
July 2004
81-81276-01 Rev A01
4.7
LOG SELECT (4Ch)
The LOG SELECT command allows the host to manage statistical information the tape drive
maintains about its own hardware parameters and about the installed media. All types of parameter
values are changeable through LOG SELECT. Read the description of the LOG SENSE (4Dh)
command on
Page 4-23
; it provides information about log page format, parameters, and supported
pages.
Figure 4-11.
LOG SELECT (4Ch) Command Descriptor Block — Data Format
Block Address
The Block Address field defines the SCSI Logical Block Address to which the
media will be positioned. These addresses start at 0 and include data blocks and
filemarks.
Bit
Byte
7
6
5
4
3
2
1
0
0
Operation Code (4Ch)
1
Logical Unit Number
Reserved
PCR
SP
2
PC
Reserved
3 - 6
Reserved
7 - 8
(MSB)
Parameter List Length
(LSB)
9
Unused
Reserved
Flag
Link
Table 4-8.
LOCATE (2Bh) Command Descriptor Block — Field Descriptions
(Continued)
Field Name
Description
Summary of Contents for DLTtape DLT1
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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...
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