86
Western Digital Hard Disk Drive OEM Specification
another complete write all), shall cause the Segment Initialized Flag to be cleared. Reallocations as a result of
reading data (foreground or background) do not clear the Segment Initialized Flag.
Implementation note for Background Operation (Function code = 0001h, 0002h)
In this mode, the drive will return command completion status when the drive finished receiving data.
Any command, including IDENTIFY DEVICE, other than SCT Status, issued to the drive while this command is in
progress will terminate the SCT Write Same command. The incoming command is executed.
Use the SCT Status command to retrieve status information about the current SCT command. Example status
information includes: command active or complete, current LBA, and errors. When this command is in progress, the
SCT status error code will be FFFFh, and set to 0000h if the command completes without error. It will be less than
FFFFh and grater the 0000h if the command terminated prematurely for any reason.
Possible Extended Status Code for Background Operation (Function code = 0001h, 0002h)
0008h
Background SCT command was aborted because of an interrupting host command
0009h
Background SCT command was terminated because of unrecoverable error
FFFFh
SCT command executing in background
Implementation note for Blocking Operation (Function code = 0101h, 0102h)
In this mode, the drive will return command completion status when the drive finished the SCT Write Same
operation.
Outputs for Error
Command Block Input Registers (Error)
Register
7 6 5 4 3 2 1 0
Error
04h
Sector Count
Extended Status code
(LSB)
Sector Number
Extended Status code
(MSB)
Cylinder Low
N/A
Cylinder High
N/A
Device/Head
- - - - - - - -
Status
51h
Table 62 Output Registers of SCT Write Same (Error)
Possible Extended Status Code for Blocking Operation (Function code = 0101h, 0102h)
0017h
Blocking SCT Write Same command was terminated because of unrecoverable error
