Western Digital Ultrastar DC HC310, Specifications

Page: 91 / 322

77
Western Digital Hard Disk Drive OEM Specification
9.18.2 SCT Command Protocol
9.18.2.1 Command Transport
SCT Command Transport occurs when a 512-
byte data packet (called “Key Sector”) is created and the written to
SMART or extended log page E0h. The key sector specifies Action and Function Codes along with the parameters
that are required to perform the action.
9.18.2.1.1 Issue SCT Command Using SMART
Command Block Output Registers
Register 7 6 5 4 3 2 1 0
Feature D6h
Sector Count 01h
Sector Number E0h
Cylinder Low 4Fh
Cylinder High C2h
Device/Head - - - D - - - -
Command B0h
Table 47 Output Registers of SCT Command Using SMART
Command Block Input Registers (Success)
Command Block Input Registers (Error)
Register 7 6 5 4 3 2 1 0 Register 7 6 5 4 3 2 1 0
Error 00h
Error
04h
Sector Count Depends on command
(LSB)
Sector Count
Extended Status code
(LSB)
Sector Number Depends on command
(MSB)
Sector Number
Extended Status code
(MSB)
Cylinder Low Number of sectors to
transfer (LSB)
Cylinder Low
Number of sectors to
transfer (LSB)
Cylinder High Number of sectors to
transfer (MSB)
Cylinder High
Number of sectors to
transfer (MSB)
Device/Head - - - - - - - - Device/Head - - - - - - - -
Status 50h
Status
51h
Table 48 Input Registers of SCT Command Using SMART