Deskstar 7K160 Hard Disk Drive Specification
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10.22.2 SCT Command Set
10.22.2.1 Long Sector Access (action code: 0001h)
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.
Word Name
alue Description
0 Action Code 0001h Read or Write a sector with full ECC. This function is
based on the obsolete ATA Read Long / Write Long
capability, and has been extended beyond 28-bit
addressing.
0001h Read Long 1 Function Code
0002h Write Long
5:2 LBA QWord Sector to be read or written
255:6 reserved 0000h
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
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