4.6 Packet Commands

4.6.6 MODE SENSE (6) command

Table 4.70 MODE SENSE (6) command

Bit

7

 

6

 

5

 

4

 

3

 

2

1

0

Byte

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

Operation Code (1Ah)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

Reserved

 

 

 

DBD

 

 

Reserved

 

 

 

 

 

 

 

 

 

 

 

 

 

2

PC

 

 

 

 

 

 

Page Code

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

 

Reserved

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

 

 

 

 

Allocation Length

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5-11

 

 

 

 

 

 

 

Reserved

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The MODE SENSE (6) command transfers the mode parameter list to the host.

When the Disable Block Descriptors (DBD) is 1, the Block Descriptor is not returned. When the DBD is 0, the Block Descriptor is returned. The Allocation Length specifies the number of bytes of the mode parameter to be transferred. When the Allocation Length is 0, this command is terminated normally without transferring data.

The Page Control (PC) specifies the type of the Page to be transferred.

 

 

Table 4.71 Page Control field

 

 

 

 

Bit 7

Bit 6

 

Parameter type

 

 

 

 

0

0

 

Current value

 

 

 

 

0

1

 

Changeable value

 

 

 

 

1

0

 

Default value

 

 

 

 

1

1

 

Saved value

 

 

 

 

Page Code specifies the Mode Page to be transferred. If Page Code is 3Fh, all Mode Pages are transferred. For page descriptors supported, see Table 4.46.

Mode pages are transferred in ascending page code order.

When 0 is specified for both the Page Code and the Page Control, the Mode Parameter Header and the Block Descriptor (only when the DBD bit is 0) are transferred.

Table 4.72 shows the mode parameter list.

C156-E205-01EN

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Image 127
Fujitsu MCJ3230AP manual Mode Sense 6 command, Page Control field