Mode Sense(6) Command (1Ah); Page Control - Sony LIB-D81 Product Description Manual

8.6. MODE SENSE(6) Command (1Ah)

8.6.1. Page Control

8.6.1.1. Current values
The MODE SENSE(6) command allows the autoloader return held parameters
to the host. This command is used in parallel with MODE SELECT(6).
Bit 7 6
Byte
0
1 Logical unit number(0h)
2 PC
3
4
5
Table 8.6.1 : MODE SENSE(6) command
When the Disable Block Descriptors (DBD) bit is 0, the MODE SENSE data
returned by the autoloader is transferred with an appended Mode Parameter
Block Descriptor. When the DBD bit is 1, the MODE SENSE data returned by
the autoloader does not have an appended Mode Parameter Block Descriptor.
The Page Control (PC) field specifies the type of Mode Parameter of the
returned Mode Page. The Page Control field is defined in Table 8.6.1.1.
Code Type of parameter
00b Current values
01b Changeable values
10b Default values
11b Saved values
Table 8.6.1.1 : Page control field
Note
The Page Control field only affects the Mode Parameters within the Mode Page.
The PS bit, Page Code, and Page Length field do not return the current value.
For the Mode Parameter Header and Mode Parameter Block Descriptor, the
current values are returned.
When the PC field is 00b, the autoloader returns current values as Mode
Parameters. The returned current values are as follows.
a) Current values of the Mode Parameters established by the last successful
MODE SELECT command.
b) If there was no successful MODE SELECT command since the last two
power on, hard reset, or BUS DEVICE RESET message, the current values
are the Mode Parameter values held internally by the autoloader.
c) If a value held internally by the autoloader (value in non-volatile memory)
is invalid, the current values are the autoloader default.
5 4 3 2
Operation code (1Ah)
Reserved DBD
Page code
Reserved(0h)
Allocation length
Control(0h)
Sub clause
8.6.1.1
8.6.1.2
8.6.1.3
8.6.1.4
Chapter 8 SCSI Commands
1 0
Reserved(0h)
84