Method and apparatus for caching data in an solid state disk (ssd) of a hybrid drive that includes the ssd and a hard disk drive (hdd)
US-2018373442-A1 · Dec 27, 2018 · US
Storage apparatus, image forming apparatus, abnormality detecting method for instantaneous power failure of hard disk, and abnormality recovery method thereof
US9196293B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9196293-B2 |
| Application number | US-201514634778-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 28, 2015 |
| Priority date | Feb 28, 2014 |
| Publication date | Nov 24, 2015 |
| Grant date | Nov 24, 2015 |
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Abstract
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Provided is a storage apparatus that detects abnormalities of a hard disk caused by the instantaneous power failure of a low voltage power supply. An effective value reduction detecting circuit transmits a detection signal, when the voltage of a low voltage power supply is lower than specific voltage. CPU memorizes time t 1 to a flash memory. Also, CPU memorizes time t 2 , when recovering low voltage power supply 13 on proper voltage. Then, CPU computes period of time T, which is time between time t 1 and t 2 . If the computed period of time T is within a range from first period of time T 1 to the second period of time T 2 , CPU operates a voltage switch and re-supply the power supply to the hard disk. If not within the range, CPU does not re-supply power to the hard disk.
First claim
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What is claimed is: 1. A storage apparatus comprising: a CPU; a hard disk that communicates with the CPU; a low voltage power supply that provides a voltage to the hard disk; a voltage detecting part that detects the voltage of the low voltage power supply; a voltage drop time measuring part that memorizes a time that the voltage detected by the voltage detecting part is less than a specified voltage which is higher than a reset voltage of the CPU; a voltage recovery time me…
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Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9196293B2 cover?
- Provided is a storage apparatus that detects abnormalities of a hard disk caused by the instantaneous power failure of a low voltage power supply. An effective value reduction detecting circuit transmits a detection signal, when the voltage of a low voltage power supply is lower than specific voltage. CPU memorizes time t 1 to a flash memory. Also, CPU memorizes time t 2 , when recovering low …
- Who is the assignee on this patent?
- Kyocera Document Solutions Inc
- What technology area does this patent fall under?
- Primary CPC classification G11B19/047. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Nov 24 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).