Hybrid drive adjusting spin-up profile based on cache status of non-volatile semiconductor memory
View Patent ↗A hybrid drive is disclosed comprising a head actuated over a disk, and a non-volatile semiconductor memory (NVSM) operable to cache data. When beginning to spin up the hybrid drive, a first spin-up profile is used while servicing access commands using the NVSM, including write commands and read commands. When a cache event occurs, spinning up the disk is finished using a second spin-up profile in order to spin-up the disk faster.
1. A hybrid drive comprising:
a disk;
a head actuated over the disk;
a non-volatile semiconductor memory (NVSM) operable to cache data; and
control circuitry operable to spin-up the hybrid drive by:
begin spinning up the disk using a first spin-up profile while servicing access commands using the NVSM, including write commands and read commands; and
when a cache event occurs, finish spinning up the disk using a second spin-up profile in order to spin-up the disk faster.
2. The hybrid drive as recited in claim 1 , wherein the second spin-up profile consumes more power than the first spin-up profile.
3. The hybrid drive as recited in claim 1 , wherein the cache event occurs when a read command cannot be serviced by the NVSM.
4. The hybrid drive as recited in claim 1 , wherein the cache event occurs when the control circuitry predicts an imminent read command will be received that cannot be serviced by the NVSM.
5. A hybrid drive comprising:
a disk;
a head actuated over the disk;
a non-volatile semiconductor memory (NVSM) operable to cache data; and
control circuitry operable to spin-up the hybrid drive by:
determining an operating mode of the hybrid drive based on a cache status of the NVSM;
selecting between a first spin-up profile and a second spin-up profile in response to the operating mode; and
spinning up the disk using the selected spin-up profile.
6. The hybrid drive as recited in claim 5 , wherein the second spin-up profile consumes more power than the first spin-up profile.
7. The hybrid drive as recited in claim 5 , wherein the control circuitry changes the operating mode when executing a boot sequence of access commands a read command cannot be serviced by the NVSM.
8. The hybrid drive as recited in claim 5 , wherein the control circuitry is further operable to configure the operating mode to select the first spin-up profile after caching data for a number of read commands in the NVSM.
9. The hybrid drive as recited in claim 5 , wherein the control circuitry is further operable to:
begin spinning up the disk using the first spin-up profile while servicing access commands using the NVSM, including write commands and read commands; and
when a cache event occurs, finish spinning up the disk using the second spin-up profile in order to spin-up the disk faster.
10. A method of spinning up a hybrid drive, the hybrid drive comprising a head actuated over a disk, and a non-volatile semiconductor memory (NVSM) operable to cache data, the method comprising:
begin spinning up the disk using a first spin-up profile while servicing access commands using the NVSM, including write commands and read commands; and
when a cache event occurs, finish spinning up the disk using a second spin-up profile in order to spin-up the disk faster.
11. The method as recited in claim 10 , wherein the second spin-up profile consumes more power than the first spin-up profile.
12. The method as recited in claim 10 , wherein the cache event occurs when a read command cannot be serviced by the NVSM.
13. The method as recited in claim 10 , wherein the cache event occurs when predicting an imminent read command will be received that cannot be serviced by the NVSM.
14. A method of spinning up a hybrid drive, the hybrid drive comprising a head actuated over a disk, and a non-volatile semiconductor memory (NVSM) operable to cache data, the method comprising:
determining an operating mode of the hybrid drive based on a cache status of the NVSM;
select between a first spin-up profile and a second spin-up profile in response to the operating mode; and
spin up the disk using the selected spin-up profile.
15. The method as recited in claim 14 , wherein the second spin-up profile consumes more power than the first spin-up profile.
16. The method as recited in claim 14 , further comprising changing the operating mode when executing a boot sequence of access commands a read command cannot be serviced by the NVSM.
17. The method as recited in claim 14 , further comprising configuring the operating mode to select the first spin-up profile after caching data for a number of read commands in the NVSM.
18. The method as recited in claim 14 , further comprising:
begin spinning up the disk using the first spin-up profile while servicing access commands using the NVSM, including write commands and read commands; and
when a cache event occurs, finish spinning up the disk using the second spin-up profile in order to spin-up the disk faster.