User's Guide

Chapter 3 Emulated DLT7000 SCSI Commands
Mode Sense (6/10) (1Ah / 5Ah)
Quantum DX-Series Software Interface Guide 209
MODE SENSE
Mode Pages
3
The following figure depicts the variable length page descriptor.
Table 160 MODE
SENSE Page
Descriptor - Data
Format
Bit/Byte 7 6 5 4 3 2 1 0
0
1
2
Descriptions of the MODE SENSE page descriptor fields are provided in
the following table. Detailed descriptions of each of the MODE SENSE
Pages follow.
Number of
Blocks
This field is sent as 0, indicating that all of the
remaining logical blocks on the tape have the
medium characteristics specified by the block
descriptor.
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 (as
specified in the I/O command). Any other value
indicates the number of bytes per block that are
used for READ, WRITE, and VERIFY type
commands that specify a fixed bit of 1 (fixed block
mode).
PS 0 Page Code
Additional Page Length
Page Defined or Vendor-Unique Parameter Bytes
Field Name Description