CN101169971A

CN101169971A - Electronic hard disk

Info

Publication number: CN101169971A
Application number: CNA2006101139587A
Authority: CN
Inventors: 许丰
Original assignee: RUIKE-TIANZHI SCIENCE-TECHNOLOGY Co Ltd BEIJING
Current assignee: RUIKE-TIANZHI SCIENCE-TECHNOLOGY Co Ltd BEIJING
Priority date: 2006-10-23
Filing date: 2006-10-23
Publication date: 2008-04-30

Abstract

The invention discloses an electronic hard disk, which includes a nonvolatile memory (such as FLASH and FRAM) as static data carrier, a random memory (such as SDRAM and DDR memory) as dynamic data carrier, and a controller with immediate access and error correction (such as ECC) for access and safety control of the memory. When external equipment accesses the electronic hard disk, the controller buffers the data in the nonvolatile memory to the random memory and reads/writes the data according the request of the external equipment. When the access of the external equipment stops or a refresh condition is satisfied (the external equipment sends a refresh request or a refresh interval of the controller is arrived), the controller writes the data in the random memory back to the nonvolatile memory. In order to prevent the data from being damaged by emergent external power failure, the electronic disk has a built-in or built-out battery for maintaining the random memory to write data to the nonvolatile memory. The invention also discloses a safety multimedia hard disk, an electronic hard disk memory and an electronic hard disk mate.

Description

Electronic hard disc

Technical field

The present invention relates to a kind of electronic hard disc, especially use the electronic hard disc of internal memory as data buffering.

Background technology

Electronic hard disc more and more is applied in the amusement equipment, existing FLASH disk read-write is slow, life-span is short, make and use underaction, if can cushion by internal memory, reduce the update times of electronic hard disc, just can improve the life-span, adopt multi-bank memory to handle simultaneously, just can significantly improve read or write speed.

Summary of the invention

The present invention overcomes electronic hard disc life-span weak point in the past, read and write slow shortcoming, a kind of electronic hard disc is provided, adopt nonvolatile memory as static data carriers, adopt random access memory as the dynamic data carrier, adopt fast access and each storer is carried out access, mapping and security control with the controller of error correction.When the external device access electronic hard disc, controller is buffered to random access memory to data in non-volatile memory, request is read and write according to external unit, when external unit stops electronic hard disc visit or arrives flush condition (external unit sends refresh requests or controller reaches periodic refreshing at interval) controller random access memory in data write back nonvolatile memory.

When the same size with random access memory of nonvolatile memory of electronic hard disc, controller is not done periodic refreshing.Power on when reading or writing for the first time the nonvolatile memory data map to random access memory, following when electric, Data Update in the random access memory is returned nonvolatile memory.

Can carry out fast access to mass storage by high-speed controller, can handle the inefficacy or the Problem-Error of individual memory cell by the error correction computing.Can shield physically vicious storage unit by mapping, can control data safety and access rights by security control.

Described electronic hard disc is characterized in that electronic hard disc has internal or external battery to keep random access memory writing the nonvolatile memory data in order to prevent the damage of outside power down suddenly to data.

Described electronic hard disc is characterized in that controller uses many group nonvolatile memorys as static data carriers, reads and/or during write data, simultaneously many groups nonvolatile memory is operated, and accelerates read or write speed.

The mode of look-alike disk array is assigned to one group of data write in a plurality of different Stand Alone Memory, makes read or write speed significantly improve.

Described electronic hard disc is characterized in that controller comprises the multimedia decoder function.

Described electronic hard disc is characterized in that controller carries out safe computing when data are read and write, and makes that the static data that is stored on the nonvolatile memory is an enciphered data.So illegal user digs when analysing chip, reads on storer less than correct data.

Described electronic hard disc is characterized in that controller has readable unique ID.Like this for encrypting and authentication brings benefit, internal key is participated in safe computing and is made that the safe computing of each electronic hard disc is all different by unique ID being disperseed to obtain sub-key.

Described electronic hard disc, it is characterized in that to store many group keys and/or algorithm in the controller, be used for correctly reading and writing the safe computing of encrypt data, the safe computing of access control device legitimacy, critical data is upgraded a kind of computing or the multiple computing in the required safe computing.

The safe computing that is used for encrypt data is promptly to the encryption and decryption computing of data on the storer.Can use algorithms of different and combination of keys.

The safe computing of access control device legitimacy is that whether true whether access control device and external users possess service condition, normally is divided into internal authentication, external authentication and user's cryptographic check.

Critical data is upgraded and is comprised that key updating, algorithm upgrade required safe computing and the controls of authority of various critical datas such as director demon renewal.

Described electronic hard disc is characterized in that controller has memory interface, can be inserted on the memory bank of computing machine or other hardware device to work.The electronic hard disc that for example is used for high-performance server directly starts from memory interface, and system moves in internal memory, and last state is preserved in shutdown, starts directly bringing into operation from the preservation state last time next time.

Described electronic hard disc is characterized in that controller has hard-disk interface, can be inserted on the hard-disk interface such as IDE, ATA, SCSI of computing machine or other hardware device to work.

Described electronic hard disc is characterized in that controller has one or more in USB interface and the various memory card interface (as CF/MMC/SD/ memory stick etc.).

Description of drawings

Embodiment

Embodiment 1 (secure multimedia electronic hard disc)

Secure multimedia electronic hard disc of the present invention, the data that the secure multimedia electronic hard disc writes are encrypted according to unique ID generation sub-key of described secure multimedia electronic hard disc when external unit, decoding was exported after the sub-key of basis oneself was decrypted during the decoding of secure multimedia electronic hard disc.If directly data are read, copy on the miscellaneous equipment and then can't correctly read.

Embodiment 2 (electronic hard disc internal memory)

Electronic hard disc internal memory of the present invention, it is characterized in that directly being inserted on the memory bar slot and use, can use separately or be used with other standard memory bar, each start is called in the memory address operation to program automatically, crucial data can be upgraded, and partly or entirely preserve current internal storage state during shutdown.Be specially adapted to distributed server or private server.

Embodiment 3 (electronic hard disc companion)

Electronic hard disc companion of the present invention can connect hard disk or mobile USB storer, and the specific format data are in electronic hard disc companion's storer in direct high speed duplicating hard disk of downloading by representative of button or the mobile USB storer.The button of uploading by representative copies to the data high-speed of specific format in the electronic hard disc companion storer in hard disk or the mobile USB storer.

Claims

1. electronic hard disc adopts nonvolatile memory as static data carriers, adopts random access memory as the dynamic data carrier, adopts fast access and with the controller of error correction each storer is carried out access and security control.When the external device access electronic hard disc, controller is buffered to random access memory to data in non-volatile memory, request is read and write according to external unit, when external unit stops electronic hard disc visit or arrives flush condition (external unit sends refresh requests or controller reaches periodic refreshing at interval) controller random access memory in data write back nonvolatile memory.

2. according to the electronic hard disc described in the claim 1, it is characterized in that electronic hard disc has internal or external battery to keep random access memory writing the nonvolatile memory data in order to prevent the damage of outside power down suddenly to data.

3. according to the electronic hard disc described in the claim 1, it is characterized in that controller uses many group nonvolatile memorys as static data carriers, read and/or during write data, simultaneously many groups nonvolatile memory is operated, accelerate read or write speed.

4. according to the electronic hard disc described in the claim 1, it is characterized in that controller comprises the multimedia decoder function.

5. according to the electronic hard disc described in the claim 1, it is characterized in that controller carries out safe computing when data are read and write, make that the static data that is stored on the nonvolatile memory is an enciphered data.

6. according to the electronic hard disc described in the claim 1, it is characterized in that controller has readable unique ID.

7. according to the electronic hard disc described in the claim 1, it is characterized in that to store many group keys in the controller, be used for correctly reading and writing the safe computing of encrypt data, the safe computing of access control device legitimacy, critical data is upgraded a kind of computing or the multiple computing in the required safe computing.

8. according to the electronic hard disc described in the claim 1, it is characterized in that controller has memory interface, can be inserted on the memory bank of computing machine or other hardware device and work.

9. according to the electronic hard disc described in the claim 1, it is characterized in that controller has hard-disk interface, can be inserted on the hard-disk interface such as IDE, ATA, SCSI of computing machine or other hardware device and work.

10. according to arbitrary described electronic hard disc in the claim 1 to 9, it is characterized in that controller has one or more in USB interface and the various memory card interface (as CF/MMC/SD/ memory stick etc.).