Disk drive storing parameters of a write operation in a plurality of data sectors
View Patent ↗A disk drive is disclosed comprising a disk having a plurality of data sectors, and a head actuated over the disk. The disk drive further comprises control circuitry operable to execute a write operation for writing data to the disk. A first part of the data is written to a first data sector together with a first sector signature data (SSD) record comprising a first parameter of the write operation and a first id that identifies the first parameter. A second part of the data is written to a second data sector together with a second SSD record comprising a second parameter of the write operation and a second id that identifies the second parameter.
1. A disk drive comprising:
a disk comprising a plurality of data sectors;
a head actuated over the disk; and
control circuitry operable to execute a write operation for writing data to the disk by:
writing a first part of the data to a first data sector together with a first sector signature data (SSD) record comprising a first parameter of the write operation and a first id that identifies the first parameter; and
writing a second part of the data to a second data sector together with a second SSD record comprising a second parameter of the write operation and a second id that identifies the second parameter.
2. The disk drive as recited in claim 1 , wherein the second SSD record comprises an end flag identifying the last data sector written out of the first plurality of data sectors.
3. The disk drive as recited in claim 1 , wherein the first parameter of the write operation comprises an ambient temperature, and the second parameter of the write operation comprises a servo parameter.
4. The disk drive as recited in claim 1 , wherein:
the first SSD record does not include the second parameter; and
the second SSD record does not include the first parameter.
5. The disk drive as recited in claim 1 , wherein the control circuitry is further operable to write a third part of the user data to a third data sector together with a third SSD record.
6. The disk drive as recited in claim 1 , wherein the control circuitry is further operable to write a third part of the user data to a third data sector together with the first SSD record.
7. The disk drive as recited in claim 1 , wherein the first id identifies the first SSD record as the beginning of a plurality of SSD records written over the first plurality of data sectors.
8. The disk drive as recited in claim 1 , wherein the control circuitry further comprises a plurality of hardware registers for storing a plurality of SSD records.
9. The disk drive as recited in claim 8 , wherein the control circuitry is further operable to select one of the registers for writing the corresponding SSD record together with user data to a data sector.
10. The disk drive as recited in claim 1 , wherein the control circuitry further comprises a disk formatter for setting an end flag in the last SSD record corresponding to the last data sector of the first plurality of data sectors.
11. The disk drive as recited in claim 1 , wherein the control circuitry is further operable to receive a read command from a host to read the first and second SSD records from the first plurality of data sectors.
12. The disk drive as recited in claim 1 , wherein the first and second SSDs further comprise a time stamp and the control circuitry is further operable to identify a sequence of SSDs based on the time stamps.
13. A method of executing a write operation in a disk drive, the disk drive comprising a disk comprising a plurality of data sectors, and a head actuated over the disk, the method comprising:
writing a first part of data to a first data sector together with a first sector signature data (SSD) record comprising a first parameter of the write operation and a first id that identifies the first parameter; and
writing a second part of the data to a second data sector together with a second SSD record comprising a second parameter of the write operation and a second id that identifies the second parameter.
14. The method as recited in claim 13 , wherein the second SSD record comprises an end flag identifying the last data sector written out of the first plurality of data sectors.
15. The method as recited in claim 13 , wherein the first parameter of the write operation comprises an ambient temperature, and the second parameter of the write operation comprises a servo parameter.
16. The method as recited in claim 13 , wherein:
the first SSD record does not include the second parameter; and
the second SSD record does not include the first parameter.
17. The method as recited in claim 13 , further comprising writing a third part of the user data to a third data sector together with a third SSD record.
18. The method as recited in claim 13 , further comprising writing a third part of the user data to a third data sector together with the first SSD record.
19. The method as recited in claim 13 , wherein the first id identifies the first SSD record as the beginning of a plurality of SSD records written over the first plurality of data sectors.
20. The method as recited in claim 13 , further comprising storing a plurality of SSD records into a plurality of hardware registers.
21. The method as recited in claim 20 , further comprising selecting one of the registers for writing the corresponding SSD record together with user data to a data sector.
22. The method as recited in claim 13 , further comprising reading the first and second SSD records from the first plurality of data sectors and transmitting the first and second SSD records to a host.
23. The method as recited in claim 13 , wherein the first and second SSDs further comprise a time stamp, the method further comprising identifying a sequence of SSDs based on the time stamps.