Seagate SCSI Interface Product Manual page 182

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In response to the Read Capacity command, the drive returns 8 bytes of Read Capacity Data to the host. The
contents of the 8 bytes are listed in Table 126.
Table 126: Read Capacity Data
Byte Description
0 Logical Block Address (MSB)
1 Logical Block Address
2 Logical Block Address
3 Logical Block Address (LSB)
4 Block Length (MSB)
5 Block Length
6 Block Length
7 Block Length (LSB)
SCSI Interface Product Manual, Rev. J