SCSI Commands
Quantum DLT 8000 Tape System
5-79
MODE SELECT Command (6) / (10) (15h) / (55h) (continued)
Table 5–38 Mode Parameter Block Descriptor — Field Descriptions (continued)
Field Name
Description
Block Length
This field specifies the length, in bytes, of each logical block transferred
over the SCSI bus. A block length of 0 indicates that the length is variable
(specified in the I/O command). Any value other than 0 indicates the
number of bytes per block to use for READ, WRITE, and VERIFY
commands that specify a “fixed” bit of 1 (i.e., fixed block mode) which
also causes the transfer length in the command descriptor block to be
defined as a block count. If fixed bit is not equal to 1, this field is
ignored.
5.9.1.3 Mode Page Descriptors
Following the MODE SELECT command’s Mode Parameter Block Descriptor are the
MODE SELECT pages, each of which sets a different device parameter. Each mode page
has a 2-byte header that identifies the page code and indicates the number of bytes in
that page.
Bit
Byte
7
6
5
4
3
2
1
0
0
PS (0)
0
Page Code
1
Additional Page Length
2 -
n
Page-Defined or Vendor Unique Parameter List
Figure 5–40 MODE SELECT Page Descriptor — Data Format
Table 5–39 MODE SELECT Page Descriptor — Field Descriptions
Field Name
Description
PS
Parameters Savable. For the MODE SELECT (6) (10) commands, this
field is reserved (0).
Additional Page Length
Indicates number of bytes in that page (not including bytes 0 and 1).
Page-Defined or Vendor
Unique Parameter List
Information in this field depends on the mode page. Refer to Sections
5.9.2 through 5.9.9.
Summary of Contents for DLTtape DLT 8000
Page 1: ...DLTTM 8000 Tape System Product Manual Nov 10 2003 81 60118 06...
Page 5: ...USER MANUAL STATEMENTS FOR CLASS B EQUIPMENT continued...
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Page 26: ...Table of Contents xxiv Quantum DLT 8000 Tape System...
Page 36: ...About This Manual Quantum DLT 8000 Tape System xxxii...
Page 54: ...General Description and Specifications 1 18 Quantum DLT 8000 Tape System...
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Page 376: ...Appendix A Definition of Vendor Unique Sense Data Information A 4 Quantum DLT 8000 Tape System...
Page 386: ...Appendix C Updating the Firmware C 6 Quantum DLT 8000 Tape System...
Page 396: ...Appendix E Visual Inspection Procedure for DLTtape Cartridges E 8 Quantum DLT 8000 Tape System...
Page 406: ...Appendix G DLT 7000 Emulation Feature G 8 Quantum DLT 8000 Tape System...
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