Quantum 10K II - page 129

SCSI Description
5–62 Quantum Atlas 10K II Ultra160/m SCSI Hard Disk Drives
MODE SELECT (6) Command (15h) (continued)
Table 5–28 Mode Parameter List — Field Descriptions
Field Description
Mode Parameter Header Contains information about the remainder of the parameter list and
is always present (see Figure 5-26 and Table 5-29).
Block Descriptor Allows the initiator to set the drive’s Logical Block Size and number
of Logical Block Addresses (see Figure 5-27 and Table 5-30).
Page(s) The page code(s) of the pages that are a part of this command.
Bit
Byte
7 6 5 4 3 2 1 0
0Mode Data Length
1Medium Type
2Device-Specific Parameter
3Block Descriptor Length
Figure 5–26 Mode Parameter Header (6-Byte) — Data Format
Table 5–29 Mode Parameter Header — Field Descriptions
Field Description
Mode Data Length Reserved. Must be 0.
Medium Type Ignored by the drive.
Device-specific Parameter Ignored by the drive.
Block Descriptor Length Zero (0) if no Block Descriptor is supplied. The length is eight (8) if a
Block Descriptor is supplied.
Bit
Byte
7 6 5 4 3 2 1 0
0Density Code
1 – 3 Number of Blocks
4Reserved
5 – 7 Block Length
Figure 5–27 Mode Parameter Block Descriptor – Data Format