Optical Drive and Library SCSI-2 Command Reference

SCSI-2 Drive Command Set
Mode Select (Group 2) Command (55H)
Chapter 22-122
Mode Select (Group 2) Command (55H)
This command sets optical disk, drive unit, or controller unit
parameters.
SP A Save Pages bit of 1 indicates that the target performs
the specified MODE SELECT operation, and saves all
the savable pages to non-volatile RAM. The pages are
only saved if different from those currently saved.
A Save Pages bit of 0 indicates the target performs the
specified MODE SELECT operation, and does not save
any pages.
Table 2-116 Mode Select (Group 2) Command CDB
Byte 7 6 5 4 3 2 1 0
0 Operation Code (55H)
1 Logical Unit Number
(0)
PF
(1)
Reserved (0) SP
2 Reserved (0)
3 Reserved (0)
4 Reserved (0)
5 Reserved (0)
6 Reserved (0)
7 Parameter List Length (MSByte)
8 Parameter List Length (LSByte)
9 Reserved (0) Flag Link