MODE SELECT(6) Command

The MODE SELECT(6) command (Table 3.66) provides a means for the initiator to specify medium, logical unit, or peripheral device parameters to the target. Targets that implement the MODE SELECT command shall also implement the MODE SENSE command. Initiators should issue MODE SENSE prior to each MODE SELECT to determine supported pages, page lengths, and other parameters.

Table 3.66 MODE SELECT(6) Command

Bit

7

6

5

4

3

 

2

 

1

0

Byte

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

Operation Code (15h)

 

 

 

 

 

 

 

 

 

 

 

 

 

1

Logical Unit Number

PF

 

Reserved

 

SP

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

Reserved

 

 

 

 

 

3

 

 

 

Reserved

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

Parameter List Length

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

 

 

Control

 

 

 

 

 

If an initiator sends a MODE SELECT command that changes any parameters that apply to other initiators, the target shall generate a unit attention condition for all initiators except the one that issued the MODE SELECT command(see ANSI SCSI-2 7.9). The target shall set the additional sense code to MODE PARAMETERS CHANGED.

PF(Page Format):

1b(SCSI-2 format)

SP(Save Pages):

0b(not save pages)

Parameter List Length:

12(Lamp timer), 12(Job separation sheet)

This field specifies the length in bytes of the mode parameter list that shall be transferred from the initiator to the target during the DATA OUT phase. A parameter list length of zero indicates that no data shall be transferred. This condition shall not be considered as an error.

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M3099GX/GH OEM Manual