Deskstar T7K500 Hard Disk Drive Specification
112
Outputs: (TF Data)
The Long Sector format for both read and write is two (512-byte) blocks long. The first block contains the user data,
the second data block contains the ECC bytes, the remainder of the second block sould be all zeros. Once the key
sector has been issued and the TF Data indicates that the drive is ready to transfer data, log page E1h should be read
or written to transfer the data. Long Sector Access commands cause a forced unit access to occur.
10.18.2.2 LBA Segment Access (action code: 0002h)
Command Block Input Registers (Success)
Error 00h
Sector Count Number of ECC bytes (LSB)
Sector Number Number of ECC bytes (MSB)
Cylinder Low Number of sectors to transfer (LSB) = 02h
Cylinder High Number of sectors to transfer (MSB) = 00h
Device/Head reserved
Status 50h
Field Size (bytes) Description
First Block
User Data 512 This is the data normally sent or returned by a read or write
command. This data may be encoded.
Second Block
ECC Data 51 ECC bytes in Vendor Specific Format. The number of bytes is
returned as TF Data on both read and write.
reserved 461 All zeros
Word Name
alue Desc
iption
0 Action Code 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)
1 Function Code
0102h Repeat Write Sector (Blocking Operation)
5:2 Start LBA QWord First LBA
9:6 Count QWord Number of sectors to fill
11:10 Pattern 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
255:12 reserved 0000h
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