METHOD AND APPARATUS FOR HARD DISK POWER FAILURE PROTECTION
First Claim
1. A method for preventing data loss in a hard disk during a power failure event, comprising:
- detecting a power failure event that prevents power from reaching at least a portion of the hard disk;
receiving power from a battery through a battery power input wire during the power failure event; and
supplying the power from the battery to a hard disk cache portion of the hard disk to maintain an integrity of data stored in the cache.
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Accused Products
Abstract
The present invention relates to a method and an apparatus for hard disk power failure protection. The method includes receiving power from a battery through a battery power input wire when the hard disk drive is out of power, supplying battery power to the cache of the hard disk drive, and performing data protection for the cache. A wire of the hard disk interface (HDI) may be set as the battery power input wire, and the battery power voltage is less than or equal to the standard voltage of the wire used as the battery power input wire. The method can ensure cache data security and integrity with low cost and maintain compatibility with existing interface configurations.
39 Citations
19 Claims
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1. A method for preventing data loss in a hard disk during a power failure event, comprising:
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detecting a power failure event that prevents power from reaching at least a portion of the hard disk; receiving power from a battery through a battery power input wire during the power failure event; and supplying the power from the battery to a hard disk cache portion of the hard disk to maintain an integrity of data stored in the cache. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for hard disk power failure protection, comprising:
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a hard disk power monitoring unit that monitors hard disk power and triggers a hard disk cache protection unit upon detection of a power failure event that prevents power from reaching at least a portion of the hard disk, wherein the hard disk cache protection unit supplies power from a connected battery supply to the hard disk cache upon receiving a power failure signal from the power monitoring unit and performs data protection for the cache. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A hard disk drive, comprising a hard disk and a controller, wherein the controller comprises a hard disk cache and a hard disk power failure protection apparatus;
wherein the hard disk power failure protection apparatus is connected to an external battery supply through a battery power input wire of the controller, and supplies power from the external battery supply to the hard disk cache during a power failure event that prevents power from reaching at least a portion of the hard disk drive. - View Dependent Claims (15, 16)
- 17. A hard disk power failure protection system comprising a battery supply and a hard disk drive, wherein the hard disk drive is connected to the battery supply through a battery power input wire, and includes a hard disk power failure protection apparatus, the hard disk power failure protection apparatus supplying power from the battery supply to the hard disk cache during a power failure event.
Specification