CN101111825A - System and method for erasing nonvolatile recording medium - Google Patents
System and method for erasing nonvolatile recording medium Download PDFInfo
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- CN101111825A CN101111825A CNA2004800448582A CN200480044858A CN101111825A CN 101111825 A CN101111825 A CN 101111825A CN A2004800448582 A CNA2004800448582 A CN A2004800448582A CN 200480044858 A CN200480044858 A CN 200480044858A CN 101111825 A CN101111825 A CN 101111825A
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Abstract
A method and system for the erasing of data from a non-volatile recording medium includes a non-volatile recording medium controller, a non-volatile recording medium, and a CPU. A data pattern used in an erasure command is sent to the non-volatile recording medium a single time. Consequently, the amount of data transferred to the non-volatile recording medium controller is reduced to a minimum. After receiving the erasure command, the non-volatile recording medium controller overwrites an erasure area with the data pattern.
Description
Technical field
The present invention relates to safety and active data is wiped.Particularly, the present invention relates to the data that are stored on the recording medium are wiped.
Background technology
Many electronic systems are used nonvolatile recording medium storage data.Nonvolatile recording medium can be hard disk (hard drive), solid state flash memory, pcmcia card, PC card, tape or optical storage media.Also can use the nonvolatile recording medium of other types.In the high security system, for example in army's method, system, use the method for deleting of complete sum safety just can not be rewritten to guarantee that in a single day data are stored in the nonvolatile recording medium.In addition, the security system of lower grade can use complete erase to protect individual or confidential data.
A kind of existing data erase method is that the pointer of the target data that need be wiped free of is pointed in deletion.Although can't visit this data by deleted pointer, these data still are recorded in the storer and can visit by other modes potentially.For example, if by ground, memory location nonvolatile recording medium is resolved fully, the data that are wiped free of may be resumed potentially.Therefore, only erasure pointer can not be wiped these data from nonvolatile recording medium safely.
Intactly rewriteeing erase area helps to provide fully and wipes.In order intactly to rewrite erase area, write down memory location in the erase area with predetermined data pattern (pattern).Therefore, the raw data that is recorded in erase area is rewritten.Data pattern can comprise various numerals and/or alphanumeric character.For example, data pattern can comprise a series of 1,0 or 1 and 0 combination at random.
In a word, if erase process is only used a kind of data pattern, be stored in the vestige of the numerical value of particular memory location before then erase process may stay.Although these vestiges are difficult for being read, these vestiges can read by using nonconventional approaches.
Summary of the invention
On the one hand, provide a kind of from nonvolatile recording medium the method for secure erase data.The processor of erasure area identifier from computing equipment is transferred to the nonvolatile recording medium controller.A plurality of memory locations in the erase area in erasure area identifier and the nonvolatile recording medium are corresponding.The nonvolatile recording medium controller can operationally link to each other with nonvolatile recording medium.Also the processor of data pattern from computing equipment is transferred to the nonvolatile recording medium controller.This data pattern of transmission in single transmission.At last, the processor of erase command from computing equipment is transferred to the nonvolatile recording medium controller.The nonvolatile recording medium controller makes up a plurality of instructions, is used for rewriteeing a plurality of memory locations of the erase area that erasure area identifier identifies.Each instruction writes at least one memory location in the erase area that is identified by erasure area identifier with data pattern.
On the other hand, erasure area identifier produces at random.On the other hand, erasure area identifier is imported by the user.On the other hand, erasure area identifier comprises initial memory location and the memory location count in the erase area.On the other hand, erasure area identifier defines erase area according to cylinder-magnetic head-sector addressing scheme.On the other hand, erasure area identifier is according to LBA (Logical Block Addressing) scheme definition erase area.
On the one hand, erasure area identifier or data pattern are stored in the memory device in advance, and described memory device links to each other with processor in the computing equipment.On the other hand, data pattern produces randomly or is imported by the user.On the other hand, the processor in computing equipment sends the signal of the data mode in the erase area of indicating nonvolatile recording medium.
On the other hand, nonvolatile recording medium is a hard disk.On the other hand, nonvolatile recording medium is solid-state prom memory.On the other hand, nonvolatile recording medium is a solid state flash memory.On the other hand, nonvolatile recording medium is a tape.
On the one hand, provide a kind of from nonvolatile recording medium the method for secure erase data.The processor of erase command from computing equipment is transferred to the nonvolatile recording medium controller.The nonvolatile recording medium controller can operationally link to each other with nonvolatile recording medium.Make up a plurality of instructions with erase area that erasure area identifier the identified corresponding a plurality of memory locations of rewriting with pre-stored.Each instruction writes the data pattern of pre-stored at least one memory location in the erase area that erasure area identifier identified of pre-stored.Erase area or data pattern are pre-stored in the nonvolatile recording medium.
On the one hand, provide a kind of from nonvolatile recording medium the method for secure erase data.The processor of erasure area identifier from computing equipment is transferred to the nonvolatile recording medium controller, wherein, a plurality of memory locations in the erase area in described erasure area identifier and the nonvolatile recording medium are corresponding, and described nonvolatile recording medium controller can operationally link to each other with nonvolatile recording medium.The processor of data pattern from computing equipment is transferred to the nonvolatile recording medium controller, and wherein, described data pattern is repeatedly transmitted, and its number of transmissions is less than the number of the memory location in a plurality of memory locations of erase area.Equally, the processor of erase command from computing equipment is transferred to the nonvolatile recording medium controller, the nonvolatile recording medium controller makes up a plurality of instructions, rewriteeing a plurality of memory locations in the erase area that erasure area identifier was identified, each instruction writes at least one memory location in the erase area that erasure area identifier identifies with data pattern.
On the one hand, provide a kind of nonvolatile recording medium erasing system.Processor transmission erasure area identifier, data pattern and erase command in the computing equipment.A plurality of memory locations in the erase area of erasure area identifier and nonvolatile recording medium are corresponding.The processor of nonvolatile recording medium controller from computing equipment receives transmission signals.The nonvolatile recording medium controller operationally links to each other with nonvolatile recording medium, and makes up a plurality of instructions to rewrite by a plurality of memory locations in the erase area that erasure area identifier was identified.Each instruction writes at least one memory location in the erase area that erasure area identifier identifies with data pattern.
On the other hand, data pattern can be transmitted by single or repeatedly transmission, and repeatedly Chuan Shu number of times is less than the number of the memory location in a plurality of memory locations of erase area.On the other hand, if erasure area identifier is 0, then data pattern is write all memory locations in the nonvolatile recording medium.
On the one hand, provide a kind of from nonvolatile recording medium the method for secure erase data.Processor from computing equipment is transferred to the nonvolatile recording medium controller with data pattern and erasure area identifier in single transmission.A plurality of memory locations in the erase area of erasure area identifier and nonvolatile recording medium are corresponding.The nonvolatile recording medium controller operationally links to each other with nonvolatile recording medium.The processor of erase command from computing equipment is transferred to the nonvolatile recording medium controller.The nonvolatile recording medium controller makes up a plurality of instructions, to rewrite by a plurality of memory locations in the erase area that erasure area identifier was identified.Each instruction writes at least one memory location in the erase area that erasure area identifier identifies with data pattern.
Description of drawings
By way of example, now accompanying drawing is done explanation.
Figure 1A shows a kind of data computing machine system that secure erase is stored in nonvolatile recording medium that is used for.
Figure 1B shows a kind of computer system, and wherein nonvolatile recording medium is hard disk drive (hard disk drive).
Fig. 2 A shows use cylinder-magnetic head-sector (cylinder-head-sector) addressing will wipe the tabular drawing that the content of message sends to hard disk (hard drive).
Fig. 2 B shows and uses logical block (logical block) addressing the content of erasure information to be sent to the tabular drawing of hard disk (hard drive).
Fig. 3 shows the process flow diagram that nonvolatile recording medium is wiped.
Embodiment
Method and system described below provides than prior art wiping the data that are stored in nonvolatile recording medium faster.Usually, the data on the erasing nonvolatile recording medium comprise the use of data pattern.Usually, when rewriteeing the memory location, data pattern is sent to nonvolatile recording medium.As a result, because secure erase generally includes the memory location that rewrites several thousand (if not millions of) in the nonvolatile recording medium, therefore need the transmission of lot of data pattern.Each data pattern is transferred to nonvolatile recording medium needs the plenty of time.Is method and system described below by reducing the data transmission times towards nonvolatile recording medium?, reduced and carried out the required time quantum of secure erase.
For the technician, clearly, this method for deleting can be used for polytype nonvolatile recording medium, comprises optics, magnetic and solid state record medium for ability.Below these and other feature will be discussed.
Figure 1A shows and is used for the data computing machine system 100 that secure erase is stored in nonvolatile recording medium 130.In one embodiment, nonvolatile recording medium 130 comprises controller 120 and memory module 125.Controller 120 can be with the computer processor of data storage in memory module 125 by the reading and writing data on commander's memory module 125.Controller 120 and for example external device communication of computing equipment 140.The data that computing equipment 140 is communicated by letter with controller 120 and write and wipe from memory module 125 with management.Computing equipment 140 comprises CPU110 and random access memory (" RAM ") 180.CPU110 management RAM storer 180.Computing equipment 140 can receive user's input by input-output apparatus 150.Input-output apparatus 150 can be keyboard, mouse, touch pad, operating rod, touch-screen, speech recognition system etc.Computing equipment 140 can be embedded control system, the embedded control system in the digital video recorder, the embedded control system in other electronic equipment etc. arbitrarily in personal computer, notebook, cell phone, personal digital assistant, media player, medium video recorder, server, digital video recorder, the medium video recorder.
In one embodiment, the user imports erase command to wipe the particular data in the memory module 125.Computing equipment 140 receives the erase command of user's input by input-output apparatus 150.Then, input-output apparatus 150 offers CPU110 with the erase command of user's input.In another embodiment, erase command is triggered or is produced by CPU110.
CPU110 communicates by sending with receiving with various command and controller 120 that the data that are stored in memory module 125 are relevant.This message that is sent to controller 120 from CPU110 is to wipe message.
Wipe message and can comprise erase command, data pattern and erasure area identifier.In one embodiment, CPU110 produces data pattern.In another embodiment, data layout produces in randomizer randomly.In one embodiment, CPU110 has randomizer.In another embodiment, user input data pattern.
Erasure area identifier stipulated the data that will wipe in the memory module 125 the set of resident memory location.Erasure area identifier produces by user's input or by CPU110.In one embodiment, the user can import the filename that will delete.According to the filename of user's input, CPU110 can search for the appropriate address of this document in nonvolatile recording medium.Then, CPU100 can produce erasure area identifier according to the start address in file size and the nonvolatile recording medium.
In another embodiment, the application program of operation may need deleted file on the computer equipment 140, and CPU110 produces erasure area identifier according to the file address in the nonvolatile recording medium.In another embodiment, the user specifies erasure area identifier by input-output apparatus 150.
Erasure area identifier can define erase area in every way.In one embodiment, erasure area identifier can be the tabulation of memory location.In another embodiment, erasure area identifier can be initial memory location and finish the memory location.In another embodiment, erasure area identifier can be initial memory location and memory location count.In another embodiment, erasure area identifier can be a mark, but will write in the described mark indication memory module 125 data pattern all writing positions.
In one embodiment, once be transferred to controller 120 from CPU110 wiping message.After controller 120 received this message, controller 120 write on data pattern in the memory module 125 and the corresponding memory location of erasure area identifier.
For example, need wipe fully under the situation of nonvolatile recording medium, need transmit data pattern 60,000,000,000 times to nonvolatile recording medium usually with 60G byte capacity in secure erase.If only the data pattern transmission primaries, then the transmission time can be ignored.Total erasing time is reduced to the used time of data that writes in nonvolatile recording medium.In this concrete example, total erasing time has reduced 15 minutes.In addition, in this example, data pattern of every extra use can be saved 15 minutes.Therefore, if secure erase need be used 3 data forms, 0x55,0xAA, 0xFF, as a part of wiping, total saving time is 45 minutes.
In another embodiment, CPU110 sends a plurality of message of wiping to controller 120.In one embodiment, all erasure informations comprise identical data pattern, but the erasure area identifier difference.Therefore, wipe the number of the number of message less than total memory location that will rewrite.For example, controller 120 receives and contains first of first erasure area identifier and first data pattern and wipe message.Controller writes first data pattern on 120 memory locations of beginning in the memory module 120 specified by first erasure area identifier.Next, controller 120 receives second message that contains second erasure area identifier and first data pattern.The message number that sends to controller is less than the sum by the memory location in the erase area of the specified memory module 125 of erasure area identifier.Therefore, owing to be not that each memory location needs transmission, so overall transmission time reduces.
In an alternative, a plurality of erasure informations can comprise identical erasure area identifier, but the data pattern difference.For example, wipe when message can rewrite certain memory location scope with first data pattern first, second wipes message can wipe identical sets of memory locations with second data pattern, to guarantee to use the secure erase of multidata pattern.In another embodiment, first wipes message can use first data pattern to rewrite the first memory location scope, and second wipes message and can use second data pattern to rewrite the second memory location scope.
When a plurality of message of wiping when being sent to controller 120, controller 120 can a plurality of positions of write-once.In one embodiment, controller 120 began to write second erase area before first erase command is finished.Write a plurality of memory locations of memory module 125 simultaneously as controller 120, rewrite the required time and further reduce being stored in data in this memory location.
In one embodiment, wipe message and do not comprise data pattern.Data pattern is pre-stored in the memory module 125.Therefore, after message was wiped in reception, controller 120 obtained data pattern by obtain data pattern from memory module 125.In another embodiment, memory module stores the set of the data pattern of being obtained by controller 120.In another embodiment, data pattern is the hardwire (hardwire) on the controller 120.
In one embodiment, because erasure area identifier prestores and is stored in the memory module 125, do not comprise erasure area identifier so wipe message.Controller 120 obtains erasure area identifier by obtain erase area from memory module 125.In another embodiment, erasure area identifier is the hardwire on the controller 120.
Figure 1B shows computing system 101, and wherein nonvolatile recording medium is a hard disk drive 130.Computing system 101 comprises the computing equipment 110 that communicates with the reception order relevant with data storage and with hard disk drive 130 by transmission.Hard disk drive 130 comprises the hard disk controller 120 of the read write command on the operation hard disk 170.
In one embodiment, when in CPU110, make up wipe message after, wiping the hard disk controller 120 of transmission of messages to the hard disk drive 130.120 pairs of hard disk controllers are wiped message and are resolved, and identification is contained in the parameter of wiping in the message, for example erase command, data pattern and erasure area identifier.
Fig. 2 A shows and sends to tabular drawing nonvolatile recording medium, that have the content of wiping message of cylinder-magnetic head-sector (" CHS ") addressing.In one embodiment, the message of wiping shown in form Figure 200 is used for writing data to the erase area of hard disk 170.In another embodiment, wiping message 200 is used for writing data to the erase area of the nonvolatile recording medium with logical storage structure similar to hard disk 170.
Wipe message and comprise erase command, erasure area identifier and data pattern.In one embodiment, wipe message and use 7 registers.In another embodiment, command register 207 comprises " Fill " order.The title of " Fill " order represents that erase area will be contained in the data pattern " filling (filled) " in the feature register 201.Be apparent that to those skilled in the art the title of this order has a plurality of other variations, as Erase, SecureErase, Delete, SecureDelete etc.
Shown in Fig. 2 A, erasure area identifier can be stored in the register 202 to 206.In one embodiment, register 202 to 206 comprises start address and sector count.Start address can be defined by the combination of cylinder number, head number and sector number.Head number is stored in the register 206, and the bit 1-4 of register 206 comprises activation bit, and bit 0 comprises head information.The cylinder packets of information is contained in the cylinder high register 205, and as the cylinder high parameter, the cylinder packets of information is contained in the cylinder low register 204, as the cylinder low parameter.Cylinder number depends on the length of cylinder and uses one or two register.First sector that sector number register 203 indications are used to write.In one embodiment, 202 indications of sector count register are written into the number of the sector of identical data pattern.In another embodiment, if sector count is zero, then this data pattern is write whole nonvolatile recording medium.In another embodiment, if sector count is the sum of sector in the non-volatile recording medium, then this data pattern is write whole nonvolatile recording medium.This data pattern is contained in the feature register 201.
Fig. 2 B shows and sends to tabular drawing 201 nonvolatile recording medium, that have the content of wiping message of LBA (Logical Block Addressing) (" LBA ").In one embodiment, the message of wiping shown in the tabular drawing 201 is used for writing data to the erase area of hard disk 170 (Figure 1B).In another embodiment, wiping message 201 is used for writing data to the erase area of the nonvolatile recording medium with logical storage structure similar with hard disk 170 (Figure 1B).
Erasure area identifier can be stored in the register 202 to 206.In one embodiment, start address defines by being stored in the sector number of wiping in one of message registers.In another embodiment, start address is stored in a plurality of wiping in the message registers.Concrete, the bit 0 of driver/head register 206, cylinder high register 205, cylinder low register 204 and sector number register 203 are the registers that are used for storage operation zone start address LBA.The LBA address may be greatly to some or all that use in these registers.
Fig. 3 shows the process 300 of obliterated data from nonvolatile recording medium.In procedure block 305, data pattern is set.Data pattern can be imported by the user, computer random generation, COMPUTER CALCULATION wait and be provided with.Further, in procedure block 310, erasure area identifier is set.Next step, in procedure block 315, the erasure area identifier of setting, the data pattern of setting and erase command are transferred to nonvolatile recording medium.In one embodiment, data pattern, erase command and erasure area identifier are transferred to hdd controller.In another embodiment, data pattern, erase command and erasure area identifier are transferred to flash controller.In another embodiment, above-mentioned all three contents are transmitted together single wiping in the message.In another embodiment, the sub-portfolio of above-mentioned three contents (subcombination) is transmitted single wiping in the message.
After receiving data pattern, erase command and erasure area identifier, carry out the structure instruction in procedure block 318.The structure instruction has been created and has been write instruction, and this writes instruction and comprises the memory address that will rewrite, employed data pattern and write command.Next,, explain to write instruction, and data pattern is write by writing the indicated memory location of instruction in procedure block 320.
After first writes,, use logic to determine whether continuing to write at Decision Block 325.For achieving this end, check erasure area identifier is to determine whether there is the rest position that can write data pattern in the erase area.If there is rest position in the erase area, then makes up another and write instruction, and carry out by procedure block 320 by procedure block 318.When after the execution of procedure block 320 places writes instruction, 325 places check erasure area identifier once more at Decision Block, to determine whether also there is the position that can write data pattern.If, make up another and write instruction and carry out in next memory location, or the like.
Can come in a different manner to determine that memory locations all in the erase area exhausts.In one embodiment, but usage counter, and with the equal value of memory location count value counter being carried out initialization.When data pattern is write the memory location, reduce this counter.If Counter Value is 0, then there is not the memory location that will rewrite.In another embodiment, use 0 value to the counter initialization, when data pattern was write the memory location, this counter added 1.If the number of the memory location in Counter Value and the erase area equates, does not then have the memory location that will rewrite.
In case rewriting is finished in all memory locations, can be at procedure block 330 places from nonvolatile recording medium transmit status signal, secure erase has successfully been finished in this status signal indication.In one embodiment, CPU receives this status signal.
Another time wiped if desired, and method 300 is restarted.In procedure block 305 data pattern is set, erasure area identifier is set, in procedure block 315 data pattern, erasure area identifier and erase command are transferred to nonvolatile recording medium then in procedure block 310.Next, make up all instructions that writes in procedure block 318, and the memory location in 320 pairs of erase area of procedure block rewrites.Wipe for the third time if desired, method 300 begins again, or the like.
In one embodiment, the user can determine another time of finishing on the nonvolatile recording medium to wipe.But the number and the order of user's selective erasing message.For example, the user can select to send 4 continuous message of wiping to hard disk controller 120, as the part of secure erase procedure.The general data form that writes hard disk or another nonvolatile recording medium continuously is hexadecimal numerical value 0x55,0xAA, 0xFF and 0x00.By write different binary data patterns to same memory location, any vestige of original file data value all is eliminated.In another embodiment, computing equipment calculates in logic needs another to wipe, and begins manner of execution 300 at this.Computing equipment is stored sexadecimal numerical value in storer, and uses these numerical value randomly when nonvolatile recording medium being started new wiping.
Though above description comprises many details, described details should not be construed as scope of the present invention is caused restriction, and is the demonstration as the preferred embodiment of the present invention.The present invention includes the combination in any or the sub-portfolio of the element that is selected from disclosed variety classes and/or embodiment.One of skill in the art will appreciate that above-mentioned feature and scope of the present invention should explain according to claims and equivalent thereof.
Claims (25)
1. the method for secure erase data from nonvolatile recording medium, described method comprises:
The processor of erasure area identifier from computing equipment is transferred to the nonvolatile recording medium controller, wherein, a plurality of memory locations in the erase area of described erasure area identifier and described nonvolatile recording medium are corresponding, and described nonvolatile recording medium controller operationally links to each other with described nonvolatile recording medium;
In single transmission, the described processor of data pattern from described computing equipment is transferred to described nonvolatile recording medium controller; And
The described processor of erase command from described computing equipment is transferred to described nonvolatile recording medium controller, described nonvolatile recording medium controller makes up a plurality of instructions, rewriteeing by the described a plurality of memory locations in the described erase area that described erasure area identifier was identified, each described instruction writes at least one memory location in the described erase area that described erasure area identifier identifies with described data pattern.
2. method according to claim 1, wherein, described erasure area identifier produces at random.
3. method according to claim 1, described erasure area identifier is imported by the user.
4. method according to claim 1, wherein, described erasure area identifier comprises initial memory location and the memory location count in the described erase area.
5. method according to claim 1, wherein, described erasure area identifier defines described erase area according to cylinder-magnetic head-sector addressing scheme.
6. method according to claim 1, wherein, described erasure area identifier defines described erase area according to the LBA (Logical Block Addressing) scheme.
7. method according to claim 1, wherein, described erasure area identifier prestores and is stored in the memory device, and described memory device links to each other with described processor in the described computing equipment.
8. method according to claim 1, wherein, described data pattern produces at random.
9. method according to claim 1, wherein, described data pattern is imported by the user.
10. method according to claim 1, wherein, described data pattern prestores and is stored in the memory device, and described memory device links to each other with described processor in the described computing equipment.
11. method according to claim 1, wherein, described nonvolatile recording medium is a hard disk.
12. method according to claim 1, wherein, described nonvolatile recording medium is solid-state prom memory.
13. method according to claim 1, wherein, described nonvolatile recording medium is a solid state flash memory.
14. method according to claim 1, wherein, described nonvolatile recording medium is a tape.
15. method according to claim 1, wherein, described nonvolatile recording medium and described nonvolatile recording medium controller are enclosed in the housing.
16. method according to claim 1 also comprises the steps: the signal of data mode in the described erase area of the described nonvolatile recording medium of indication is transferred to described processor in the described computing equipment.
17. the method for secure erase data from nonvolatile recording medium, described method comprises:
The processor of erase command from computing equipment is transferred to the nonvolatile recording medium controller, and wherein, described nonvolatile recording medium controller operationally links to each other with described nonvolatile recording medium; And
Make up a plurality of instructions, with erase area that erasure area identifier the identified corresponding a plurality of memory locations of rewriting with pre-stored, each described instruction writes the data pattern of pre-stored by at least one memory location in the described erase area that erasure area identifier identified of described pre-stored.
18. method according to claim 17, wherein, described erase area prestores and is stored in the described nonvolatile recording medium.
19. method according to claim 17, wherein, described data pattern prestores and is stored in the described nonvolatile recording medium.
20. the method for secure erase data from nonvolatile recording medium, described method comprises:
The processor of erasure area identifier from computing equipment is transferred to the nonvolatile recording medium controller, wherein, a plurality of memory locations in the described erase area of described erasure area identifier and described nonvolatile recording medium are corresponding, and described nonvolatile recording medium controller operationally links to each other with described nonvolatile recording medium;
The described processor of data pattern from described computing equipment is transferred to described nonvolatile recording medium controller, wherein, described data pattern is repeatedly transmitted, and the number of times of described repeatedly transmission is less than the number of the memory location in described a plurality of memory locations of described erase area; And
The described processor of erase command from described computing equipment is transferred to described nonvolatile recording medium controller, described nonvolatile recording medium controller makes up a plurality of instructions, to rewrite by a plurality of memory locations in the described erase area that described erasure area identifier was identified, each described instruction writes described data pattern at least one memory location in the described erase area that is identified by described erasure area identifier.
21. a nonvolatile recording medium erasing system, described system comprises:
Processor in the computing equipment, wherein, the transmission of described processor erasure area identifier, data pattern and erase command in the described computing equipment, a plurality of memory locations in the described erase area of described erasure area identifier and described nonvolatile recording medium are corresponding; And
The nonvolatile recording medium controller, wherein, described nonvolatile recording medium controller receives the transmission signals from the described processor in the described computing equipment; Described nonvolatile recording medium controller operationally links to each other with described nonvolatile recording medium; Described nonvolatile recording medium controller makes up a plurality of instructions, to rewrite by a plurality of memory locations in the described erase area that described erasure area identifier was identified, each described instruction writes described data pattern at least one memory location in the described erase area that is identified by described erasure area identifier.
22. system according to claim 21, wherein, described data pattern is once transmitted.
23. system according to claim 21, wherein, described data pattern is repeatedly transmitted, and the number of times of described repeatedly transmission is less than the memory location in described a plurality of memory locations of described erase area.
24. system according to claim 21 wherein, if described erasure area identifier is 0, then writes described data pattern all memory locations in the described nonvolatile recording medium.
25. the method for secure erase data from nonvolatile recording medium, described method comprises:
Processor from computing equipment is transferred to the nonvolatile recording medium controller with data pattern and erasure area identifier in single transmission, wherein, a plurality of memory locations in the described erase area of described erasure area identifier and described nonvolatile recording medium are corresponding, and described nonvolatile recording medium controller operationally links to each other with described nonvolatile recording medium; And
The described processor of erase command from described computing equipment is transferred to described nonvolatile recording medium controller, described nonvolatile recording medium controller makes up a plurality of instructions, to rewrite by the described a plurality of memory locations in the described erase area that described erasure area identifier was identified, each described instruction writes described data pattern at least one memory location in the described erase area that is identified by described erasure area identifier.
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| CNA2004800448582A CN101111825A (en) | 2004-12-06 | 2004-12-06 | System and method for erasing nonvolatile recording medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106796632A (en) * | 2014-09-29 | 2017-05-31 | 亚马逊技术股份有限公司 | To the Remote Visit and Control of data storage |
| CN108470007A (en) * | 2012-01-26 | 2018-08-31 | 内存技术有限责任公司 | The device and method of cache memory movement are provided by nonvolatile mass storage system |
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2004
- 2004-12-06 CN CNA2004800448582A patent/CN101111825A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108470007A (en) * | 2012-01-26 | 2018-08-31 | 内存技术有限责任公司 | The device and method of cache memory movement are provided by nonvolatile mass storage system |
| CN108470007B (en) * | 2012-01-26 | 2022-06-17 | 内存技术有限责任公司 | Apparatus and method for providing cache move with non-volatile mass storage system |
| CN106796632A (en) * | 2014-09-29 | 2017-05-31 | 亚马逊技术股份有限公司 | To the Remote Visit and Control of data storage |
| US10747822B2 (en) | 2014-09-29 | 2020-08-18 | Amazon Technologies, Inc. | Remote access control for stored data |
| CN106796632B (en) * | 2014-09-29 | 2020-10-27 | 亚马逊技术股份有限公司 | Remote access control to stored data |
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