Technical information

HGST Ultrastar C15K600 Hard Disk Drive Specification
417
22.3.2.4
Field Replaceable Unit (FRU) Sense Data Descriptor (Byte
40 - 43)
The Field Replaceable Unit (FRU) Sense Data Descriptor is stored in bytes 40 through 43 of descriptor format sense
data. Format of Field Replaceable Unit (FRU) Sense Data Descriptor is shown in Table 312.
Table 321 Field Replaceable Unit Sense Data Descriptor Format
Byte
Bit
7
6
5
4
3
2
1
0
0
Descriptor Type (03h)
1
Additional Length (02h)
2
Reserved
3
Field Replaceable Unit Code
Descriptor Type
Set to 03h for Command-specific Sense Data Descriptor.
Additional Length
Set to 02h for Field Replaceable Unit Sense Data Descriptor.
Command-specific Information
This field is set the same way as the Field Replaceable Unit Code of fixed
format sense data. (See section 22.2.9 "FRU: Field Replaceable Unit (Byte
14)" for details).
22.3.2.5
Block Command Sense Descriptor (Byte 44 - 47)
The Block Command Sense Data Descriptor is stored in bytes 44 through 47 of descriptor format sense data. Format
of the Block Command Sense Data Descriptor is shown in Table 313.
Table 322 Block Command Sense Data Descriptor Format
Byte
Bit
7
6
5
4
3
2
1
0
0
Descriptor Type (05h)
1
Additional Length (02h)
2
Reserved
3
Reserved=0
ILI
Reserved=0
Descriptor Type
Set to 05h for Block Command Sense Data Descriptor.
Additional Length
Set to 02h for Block Command Sense Data Descriptor.
ILI:
Value of the ILI bit is set to indicate what type of value is stored in the Information field of the
Information Sense Data Descriptor (see section 22.3.2.1 "Information Sense Data Descriptor
(Byte 8 - 19)" for details):