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C156-E142-02EN 4 - 67
4.6.17 SEEK command
Table 4.102 SEEK command
Bit
Byte
76543210
0 Operation Code (2Bh)
1 Logical Unit Number Reserved
2-5 Logical Block Address
6-11 Reserved
The SEEK command positions the head on the track at the specified logical block address.
Logical Block Address specifies the logical block address at which the head is positioned.
4.6.18 START/STOP UNIT command
Table 4.103 START/STOP UNIT command
Bit
Byte
76543210
0 Operation Code (1Bh)
1 Logical Unit Number Reserved IMMED
2-3 Reserved
4 Reserved LoEj Start
5-11 Reserved
The START/STOP UNIT command ejects media or starts and stops rotating the disk.
When the IMMED (Immediate) bit is 1, command completion is reported before processing is
completed.
Processing for other values is listed in Table 4.104.