Seagate Medalist 2160N (ST52160N), Product Manual

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3.6.10 Read Long command (3E
H
)
When the drive receives the Read Long command, it transfers data to
the initiator.
Bytes
Bits
7 6 5 4 3 2 1 0
0 0 0 1 1 1 1 1 0
1 LUN 0 0 0 0 0
2–5 Logical block address
6 0 0 0 0 0 0 0 0
7–8 Byte transfer length
9 0 0 0 0 0 0 0 0
Bytes 2–5 The logical block address specifies the LBA where the drive
begins reading data.
Bytes 7–8 The byte transfer length specifies the number of bytes
transferred to the initiator. The drive transfers the logical
block size plus twenty. If the byte transfer length is 0, the
drive does not transfer any data to the initiator. This condi-
tion is not considered an error.
Otherwise, transfer length
must be 532 (214
H
) Bytes.
3.6.11 Write Long command (3F
H
)
When the drive receives the Write Long command, it writes one logical
block of data and twenty bytes of error correction code (ECC) to the disc.
During this command, the drive does not perform any ECC verification.
Bytes
Bits
7 6 5 4 3 2 1 0
0 0 0 1 1 1 1 1 1
1 LUN 0 0 0 0 0
2–5 Logical block address
6 0 0 0 0 0 0 0 0
7–8 Byte transfer length
9 0 0 0 0 0 0 0 0
Bytes 2–5
The logical block address specifies the LBA where the drive
begins writing data.
74 Medalist Pro 2160N/2160WC Product Manual, Rev. A