Seek control apparatus, seek control method and storage apparatus
A seek control apparatus for performing a seek control of a head comprises an MCU that acquires control information corresponding to the externally indicated data length out of the control information stored in a storage section storing the control information for seek control for each of a plurality of data length ranges and performs a seek control according to the acquired control information.
1. A seek control apparatus for performing a seek control of a head, comprising:
a control section that acquires control information corresponding to an externally indicated data length out of the control information stored in a control information storage section storing the control information for seek control for each of a plurality of data length ranges and performs a seek control according to the acquired control information;
wherein the control information includes information on the relationship between a seek distance and a seek time and a predetermined offset to be added to the seek time for each of the data length ranges; and
the control section performs a reordering operation according to the control information.
2. The apparatus according to claim 1 , wherein
the control information includes information on a seek profile for each of the data length ranges.
3. The apparatus according to claim 2 , wherein
the control information includes information on the relationship between a seek distance and a seek time corresponding to each of the seek profiles.
4. The apparatus according to claim 1 , wherein
the offset is determined according to a retry probability in each of the data length ranges.
5. The apparatus according to claim 1 , wherein
the data length is an externally indicated data length of a write operation or a read operation.
6. The apparatus according to claim 1 , wherein
the data length is a block length.
7. A seek control method for performing a seek control of a head, comprising:
a control information acquisition step that acquires control information corresponding to an externally indicated data length out of the control information stored in advance for seek control for each of a plurality of data length ranges; and
a control step that performs a seek control according to the control information acquired in the control information acquisition step;
wherein the control information includes information on the relationship between a seek distance and a seek time and a predetermined offset to be added to the seek time for each of the data length ranges; and
the control step performs a reordering operation according to the control information.
8. The method according to claim 7 , wherein
the control information includes information on a seek profile for each of the data length ranges.
9. The method according to claim 8 , wherein
the control information includes information on the relationship between a seek distance and a seek time corresponding to each of the seek profiles.
10. The method according to claim 7 , wherein
the offset is determined according to a retry probability in each of the data length ranges.
11. The method according to claim 7 , wherein
the data length is an externally indicated data length of a write operation or a read operation.
12. The method according to claim 7 , wherein
the data length is a block length.
13. A storage apparatus to be used for seek control of a head, the storage apparatus comprising:
a control information storage section that stores control information for seek control for each of a plurality of predetermined data length ranges; and
a control section that acquires the control information corresponding to an externally indicated data length out of the control information stored in the control information storage section and performs a seek control according to the control information;
wherein the control information includes information on the relationship between a seek distance and a seek time and a predetermined offset to be added to the seek time for each of the data length ranges; and
the control section performs a reordering operation according to the control information.
14. The apparatus according to claim 13 , wherein
the control information includes information on a seek profile for each of the data length ranges.
15. The apparatus according to claim 14 , wherein
the control information includes information on the relationship between a seek distance and a seek time corresponding to each of the seek profiles.
16. The apparatus according to claim 13 , wherein
the offset is determined according to the retry probability in each of the data length ranges.
17. The apparatus according to claim 13 , wherein
the data length is the externally indicated data length of a write operation or a read operation.