Technical information

HGST Ultrastar C15K600 Hard Disk Drive Specification
156
18.10.1
Mode Parameter List
The mode parameter list contains a header followed by zero or one block descriptors followed by zero or more
variable length pages.
18.10.1.1
Header
The header used for the 6-byte CDB is defined below.
Table 129 Mode parameter header (6)
Byte
Bit
7
6
5
4
3
2
1
0
0
Mode Data Length
1
Medium Type = 0
2
WP=0
Reserved=0
DPOFUA = 1
Reserved = 0
3
Block Descriptor Length (= 0 or 8)
The header used for the 10-byte CDB is defined below.
Table 130 Mode parameter header (10)
Byte
Bit
7
6
5
4
3
2
1
0
0 - 1
(MSB)
Mode Data Length
(LSB)
2
Medium Type = 0
3
WP=0
Reserved=0
DPOFUA =1
Reserved = 0
4
Reserved = 0
Long LBA
5
Reserved = 0
6 - 7
(MSB)
Block Descriptor Length
(LSB)
- Mode Data Length. When using the MODE SENSE command, the mode data length field specifies the length
in bytes of the following data that is available to be transferred. The mode data length does not include the
length byte itself. When using the MODE SELECT command, this field is reserved.
- Medium Type field is always set to zero in the drive (Default Medium Type).
- WP. When used with the MODE SELECT command, the Write Protect (WP) bit is reserved.
When used with the MODE SENSE command, a Write Protect (WP) bit of zero indicates that the medium is
write enabled.
- DPOFUA bit value of 1 indicates that the Target supports the FUA and DPO bits in the Read and Write
Commands.
- LONGLBA bit value of 0 indicates that any following Block Descriptor uses the Short LBA Block Descriptor
format. A LONGLBA bit value of 1 indicates that any following Block Descriptor uses the Long LBA Block
Descriptor format
- Block Descriptor Length specifies the length in bytes of the block descriptor. Values of 0, 8, and 16 are