Cdb fields – HP C737990900 User Manual
Page 92
92 Commands
10-Byte Version
CDB Fields:
3
Reserved (0)
4
Allocation Length
5
Control
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
0
Operation Code (5Ah)
1
Reserved (0)
DBD
Reserved (0)
2
PC
Page Code
3
(MSB)
Reserved (0)
6
(LSB)
7
(MSB)
Allocation Length
8
(LSB)
9
Control
DBD
Disable Block Descriptors flag
0
Allows the drive to return the
MODE SELECT
block descriptor.
1
Prevents the drive from returning the
MODE SELECT
block descriptor.
PC
Page Control—Indicates the type of page parameter values to be returned to the host, as shown in
the following table:
7
6
Description
0
0 Report Current Values: the current values of the parameters are returned.
0
1 Report Changeable Values: the page returned has its non-changeable parameter
fields cleared to 0. The fields that are changeable are set to all 1’s.
1
0/1 Report Default Values: the page returned contains the power-on/reset/bus-device-
reset values of the mode parameters.
Page Code
This allows the host to select any specific page, or all the pages supported by the drive.
0
The drive returns no mode pages, so only the header and block descriptor are
returned.