| 发明名称 |
TIMING OF POWER STATE CHANGE IN A DISK DRIVE BASED ON DISK ACCESS HISTORY |
| 摘要 |
A data storage device that includes a magnetic storage device and a non-magnetic nonvolatile storage device that measures a hit rate of read/write commands that result in accesses to the non-magnetic nonvolatile storage device, and adjusts a length of a time period, such as an idle time, based on the hit rate. The duration of the time period can be set each time the magnetic storage device is accessed. Upon expiration of the time period, if the magnetic storage device has not yet been accessed, the magnetic storage device is changed from a higher power consumption state to a lower power consumption state. |
| 申请公布号 |
US2015055243(A1) |
申请公布日期 |
2015.02.26 |
| 申请号 |
US201313975207 |
申请日期 |
2013.08.23 |
| 申请人 |
KABUSHIKI KAISHA TOSHIBA |
发明人 |
EHRLICH Richard M.;BUDIMAN Mine Wonkyung;DUNN Eric R.;LE Annie Mylang;ZAYAS Fernando Anibal |
| 分类号 |
G11B5/012 |
主分类号 |
G11B5/012 |
| 代理机构 |
|
代理人 |
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| 主权项 |
1. A method of power management in a data storage device that includes a magnetic storage device and a solid-state nonvolatile storage device, the method comprising:
setting a time period each time the magnetic storage device is accessed, the magnetic storage device being changed to a lower power consumption state when the time period expires; measuring a number of accesses to the data storage device that are accesses to the solid-state nonvolatile storage device; and adjusting a length of the time period based on the measured number of accesses. |
| 地址 |
Tokyo JP |
