![background image](http://html2.mh-extra.com/html/quantum/dlt-s4/dlt-s4_reference-manual_3531879134.webp)
Chapter 4 SCSI Commands
MODE SELECT (6) / (10) Command (15h / 55h)
DLT-S4 Interface Reference Guide
100
Figure 50
MODE SELECT
(10)
Command Descriptor Block —
Data Format
Table 63
MODE SELECT
(6)/
(10) Command Descriptor
Block — Field Descriptions
Figure 51
shows the format of the Mode Parameter List that the host
passes to the drive.
Bit
Byte
7
6
5
4
3
2
1
0
0
Operation Code (55h)
1
Reserved
PF
Reserved
SP (0)
2 — 6
Reserved
7 — 8
(MSB)
Parameter List Length
(LSB)
9
Control
Note:
The drive returns a
CHECK CONDITION
status with Sense Key
set to
ILLEGAL REQUEST
if it receives an unsupported page
code or a page field with values not supported or not
changeable. In such cases, the drive does not change any
parameters as a result of a command.
Field
Description
PF
Page Format. Indicates that the data the host sent after the
MODE SELECT
header and block descriptors complies with
the definition of pages in the SCSI-3 specification. If the Page
Format bit is set to 0, only a Mode Parameter Header and
Mode Parameter Block Descriptor may be included in the
mode parameter data.
SP
Save Parameters. Must be set to 0.