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DLT1/VS80 SCSI Interface Guide
81-81276-01 Rev A01
July 2004
4-69
4.10.1 MODE SENSE Parameter List
The MODE SENSE (6) data contains a 4-byte header followed by one 8-byte block descriptor, which
is in turn followed by zero or more variable length pages, depending on the Page Code and the
Allocation Length.
Figure 4-44.
MODE SENSE (6) Data Header — Data Format
Table 4-39.
MODE SENSE (1Ah/5Ah) 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.
DBD
Disable Block Descriptors. If this bit is 0, the tape drive returns the Block
Descriptor Data. If the Disable Block Descriptors bit is 1, the tape drive does not
return Block Descriptor information.
PC
Page Control. This field indicates the type of page parameter values to be returned
to the host as shown in the following table:
Code
00
01
10
11
Description
Report Current Values
Report Changeable Values
Report Default Values
Report Saved Values
The Additional Page Length field of each page the tape drive returns indicates the
number of bytes supported for that page.
Page Code
Allows the host to select any specific page or all of the pages the tape drive
supports.
Allocation Length
The Allocation Length field specifies the number of bytes that the host has
allocated for returned MODE SENSE data. An Allocation Length of 0 means that
the tape drive returns no MODE SENSE data. This is not considered an error and
GOOD status is returned.
Bit
Byte
7
6
5
4
3
2
1
0
0
Mode Sense Data Length
1
Media Type
2
WP
Buffered Mode
Speed (0)
3
Block Descriptor Length (08h)
Summary of Contents for DLTtape DLT1
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: ......