10-byte version

 

 

7

 

6

5

4

 

3

2

1

0

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

Operation

Code (55h)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

Reserved (0)

 

PF

 

 

Reserved (0)

 

SP (0)

 

 

 

 

 

 

 

 

 

 

 

 

 

2

(MSB)

 

 

 

Reserved (0)

 

 

 

 

 

 

 

 

 

 

 

 

 

6

 

 

 

 

 

 

(LSB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

(MSB)

 

 

 

Parameter List Length

 

 

 

 

 

 

 

 

 

 

 

 

 

8

 

 

 

 

 

 

(LSB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9

 

 

 

 

Control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CDB fields:

PF

Page Format

 

0

The MODE SELECT parameter data is not SCSI-2 mode page compatible. Only

 

 

the parameter header and block descriptor may be sent.

 

1

The parameter data is SCSI-2 mode-page compatible.

 

 

SP

Save Pages

 

0

This bit is not supported and must be zero.

 

 

 

Parameter List

0

No data is transferred.

Length

>0

The length in bytes of the MODE SELECT parameter list to be transferred.

 

 

 

 

Specific status:

Following a successful Mode Select command, Unit Attention status is posted to all initiators other than the initiator of the Mode Select command. The sense key is set to UNIT ATTENTION. Additional sense is set to 2A01h (mode parameters changed).

Mode parameter pages

Mode data is recovered from the drive by means of a MODE SENSE command. After modification, it is returned to the drive via a MODE SELECT command. In real-life, many hosts do not use MODE SENSE and return whatever MODE SELECT data suits them into the drive.

72 Commands