Hitachi HDS723020BLA642 Specifications page 94

Once the key sector has been issued, if the Function Code was 0002h or 0102h and the TF Data indicates that
the drive is ready to receive data, log page E1h should be written to transfer the data.
This command can change the Segment Initialized Flag. If the command writes all the user addressable sectors
and completes without encountering an error or being aborted, then the "Segment Initialized Flag" (bit 0 of the
Status Flags in the SCT Status. See0) shall be set to 1. A write to any user addressable sector on the drive
(except 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.
Hitachi hard disk drive specifications
94