Mode Sense Command (1A H ) - Seagate MEDALIST 1080SL Product Manual

Medalist 1080sl SCSI Product Manual, August 1995
3.4.13 Mode Sense command (1A
When the initiator sends this command to the drive, it returns mode-page
parameters to the initiator. This command is used in conjunction with the
Mode Select command.
Bytes
7 6
0 0 0
1 LUN
2 PCF
3 0 0
4
5 0 0
Byte 2 The page control field (PCF) determines the content of Mode
Parameter bytes. Regardless of the value of the PCF, the block
descriptor always contains the current values.
PCF bit 7 PCF bit 6
0 0
0 1
1 0
1 1
The page code is the designator that is unique to each page.
The page codes are listed in Section 3.4.13.1.
Byte 4 The allocation length specifies the number of bytes that the
initiator has allocated for returned Mode Sense data. An alloca-
tion length of 0 means that no Mode Sense data is to be
transferred. This condition is not considered an error. Any other
value represents the number of bytes to be transferred. For a
description of the allocation length, see Section 3.4.13.1.
)
H
Bits
5 4 3 2
0 1 1 0
0 0 0
Page code
0 0 0 0
Allocation length
0 0 0 0
Effect
Return current values.
Return changeable values.
Return default values.
Return saved values.
47
1 0
1 0
0 0
0 0
0 0