Hitachi HTS542525K9SA00 Specifications page 131

10.22.2.2 LBA Segment Access (action code: 0002h)
Word Name
0 Action Code
1 Function Code
5:2 Start LBA
9:6 Count
11:10 Pattern
255:12 reserved
Command Block Input Registers (Success)
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
The LBA Segment Access command will begin writing sectors from Start LBA in incrementing order until Count
sectors have been written. A Count of zero means apply operation from Start LBA until the last user LBA on the
drive is reached. The HPA feature determines the last user LBA. This command will not write over a hidden partition
when hidden partitions are enabled using the Host Protected Area drive capabilities. Automatic sector reassignment
is permitted during the operation of this function.
If Start LBA or Start LBA + Count go beyond the last user LBA then an error is reported and the SCT command is
not executed. Issuing this command with a value of zero for Start LBA and Count will cause all LBAs of the drive
to be written the specified pattern.
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
Value Description
0002h This action writes a pattern or sector of data
repeatedly to the media. This capability could also be
referred to as "Write All" or "Write Same".
0001h Repeat Write Pattern (Background Operation)
0002h Repeat Write Sector (Background Operation)
0101h Repeat Write Pattern (Blocking Operation)
0102h Repeat Write Sector (Blocking Operation)
QWord First LBA
QWord Number of sectors to fill
DWord If the Function Code is 0001h, this field contains a
32-bit pattern that is written on the media starting at
the location specified in words two through five
0000h
00h
Reserved
Reserved
Number of sectors to transfer (LSB) = 01h
Number of sectors to transfer (MSB) = 00h
reserved
50h
Deskstar 7K160 Hard Disk Drive Specification
117