Seagate STT8000A - Manual (Page 50)

Chapter 5 ATAPI Interface
Page 42 STT8000A Product Manual
Locate command
Bit
Byte
7 6 5 4 3 2 1 0
0 Operation code (2Bh)
1 Reserved CP Reserved
2 Reserved
3 (MSB)
4 Logical Block Address
5
6 (LSB)
7 Reserved
8 Partition
9 Reserved
If the Change Partition (CP) bit is set, the drive first changes to the specified
partition, then attempts to locate before the specified logical block. (All addresses
are interpreted as logical.) A locate to Block 0 (in any partition) is treated like a
rewind (to BOP)and does not start a read-ahead. Depending on the exact sequence
of commands, LOCATE to Block 0 might or might not report a Blank Check error.
The DSC bit is reset (0) after this command is accepted and is set (1) when
completed. REQUEST SENSE can then be used to verify successful command
completion.