Sct Command Set - Hitachi HTS542525K9SA00 Specifications

10.22.2 SCT Command Set

10.22.2.1 Long Sector Access (action code: 0001h)
Word Name
0 Action Code
1 Function Code
5:2 LBA
255:6 reserved
Outputs: (TF Data)
Command Block Input Registers (Success)
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
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.
Field
User Data
ECC Data
reserved
Value
0001h
0001h
0002h
QWord
0000h
Number of ECC bytes (LSB)
Number of ECC bytes (MSB)
Number of sectors to transfer (LSB) = 02h
Number of sectors to transfer (MSB) = 00h
reserved
Size (bytes) Description
512 This is the data normally sent or returned by a read or write
command. This data may be encoded.
51 ECC bytes in Vendor Specific Format. The number of bytes is
returned as TF Data on both read and write.
461 All zeros
Deskstar 7K160 Hard Disk Drive Specification
Description
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.
Read Long
Write Long
Sector to be read or written
00h
50h
First Block
Second Block
116