CN100524258C - Method for protecting computer data - Google Patents
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- CN100524258C CN100524258C CNB2005100229628A CN200510022962A CN100524258C CN 100524258 C CN100524258 C CN 100524258C CN B2005100229628 A CNB2005100229628 A CN B2005100229628A CN 200510022962 A CN200510022962 A CN 200510022962A CN 100524258 C CN100524258 C CN 100524258C
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Abstract
This invention takes advantage of the double storage bases and dynamic random storage element, when the abnormal current broken of the computer comes about, the power of the computer's double storage bases and dynamic random storage element can be transferred to the batteries, and the bases and the dynamic random storage element can automatically refresh. This invention also includes when the computer starts, it can examine whether there is abnormal current broken which results to the system off. If there is, the system administrative broken fellow of the computer will initialize and stop the self refresh of the double bases and random dynamic storage element, and initializing the storage base.
Description
Technical field
The invention provides a kind of method of protecting computer data, refer to a kind of method of when the undesired outage of computing machine, protecting computer data especially.
Background technology
Along with development of computer, people more and more lean on Computer Processing and hold data; And the degree of stability of computing machine and reliability promptly become an important problem.The normal mechanism of many copy datas or error detection and automatic debug that adopts is to avoid damaging data because of the fault of computer hardware in known, yet when the power supply of computing machine breaks down, when promptly what is called is shut down because of undesired outage, (dynamic random access memory, DRAM) data in will run off unavoidablely and have no the road of redemption to be stored in the dynamic random storing memory.
In fact computer-internal has battery, externally under the power-off, provides computer-internal required micro-current.Therefore the mechanism of proposition arranged in known, utilize quick metal oxide semiconductcor field effect transistor switch (quick MOS-FET switch) when computing machine shuts down because of undesired outage, the power supply of dynamic random storing memory source is switched to the battery of computer-internal, attempt to solve when the power supply of computing machine breaks down the data in the dynamic random storing memory the problem that runs off.Yet fast the cost of metal oxide semiconductcor field effect transistor switch is higher, and it is not to utilize that existing element and control method solve problem in the computing machine, and is entirely the mechanism that independently adds; For manufacturing the computing machine dealer, be extra burden, effect is very limited.
Summary of the invention
Therefore fundamental purpose of the present invention is to provide a kind of method of protecting computer data when the undesired outage of system.This method is utilized the characteristic of dual-bank dynamic ram, data are stored in thesaurus in the dual-bank dynamic ram in computing machine undesired when outage, and the data that can be preserved in the safe release of when start with the step of correspondence are to overcome the problem in the above-mentioned known technology.
The present invention discloses a kind of method of protecting computer data, and it comprises: when computing machine enters the system management interrupt flow process, check whether power fail takes place; If check and find power fail takes place, then set protected data and be masked as first value; The power supply of the dual-bank dynamic RAM of this computing machine is switched to battery; First thesaurus of this dual-bank dynamic RAM is made as the self pattern; When this computer booting, check this protected data sign; When this protected data is masked as this first value, second thesaurus of this dual-bank dynamic RAM of initialization; Behind second thesaurus of this dual-bank dynamic RAM of initialization, this system for computer management interrupt flow process of initialization; And after this system management interrupt flow process of initialization, first thesaurus of this dual-bank dynamic RAM stops self.
The present invention discloses a kind of method of protecting computer data in addition, and it comprises: when computing machine enters the system management interrupt flow process, check the whether undesired outage of this computing machine; When the non-undesired outage of this computing machine, set protected data and be masked as second value; When this computer booting, check this protected data sign; When this protected data is masked as first value, second thesaurus of this dual-bank dynamic RAM of initialization; Wherein this first value is non-is this second value; Behind second thesaurus of this dual-bank dynamic RAM of initialization, this system management interrupt flow process of initialization; And after this system management interrupt flow process of initialization, first thesaurus of this dual-bank dynamic RAM finishes self.
The present invention discloses a kind of method of recovering the data of being preserved when computing machine shuts down because of undesired outage in addition, and it comprises: when computer booting, check that whether this computing machine shuts down because of undesired outage before start; When this computing machine is when shutting down because of undesired outage before start, second thesaurus of the dual-bank dynamic RAM of this computing machine of initialization; Behind second thesaurus of this dual-bank dynamic RAM of initialization, this system for computer management interrupt flow process of initialization; And after this system management interrupt flow process of initialization, first thesaurus of this dual-bank dynamic RAM stops self.
Description of drawings
Fig. 1 is the control circuit structural representation of general dual-bank dynamic RAM.
Fig. 2 is for using the computer system synoptic diagram of the inventive method.
Fig. 3 is the process flow diagram of first of the method for protection computer data of the present invention.
Fig. 4 is the process flow diagram of second portion of the method for protection computer data of the present invention.
Fig. 5 is the control circuit structural representation of dual-bank dynamic RAM of the present invention.
[main element label declaration]
10,20,50 computer systems
11 north bridges
12,22 south bridges
13A, 13B, 29 dual-bank dynamic RAM
13A0,13A1,13B0, the thesaurus of 13B1 dual-bank dynamic RAM
24 power supply units
241 Power supply detectors
251,252 transformers
26 CPU (central processing unit)
27 power switchers
28 batteries
300～360,400～480 steps
541,542 with the door
Embodiment
Dual-bank dynamic RAM (dual-bank dynamic random acccssmemory, dual-bank DRAM) can be regarded as having two storeies that can control respectively and operate (being referred to as with bank0 and bank1 respectively), be the kind of the present storer that more and more generally adopts.See also Fig. 1.Figure 1 shows that the control circuit structural representation of existing general dual-bank dynamic RAM.In existing general calculation machine system 10, north bridge 11 connects respectively and controls dual-bank dynamic RAM 13A and 13B.Wherein, north bridge 11 can be distinguished two block storages of independent control dual-bank dynamic RAM 13A: 13A0 and 13A1, and two block storages of independent respectively control dual-bank dynamic RAM 13B: 13B0 and 13B1.The present invention promptly utilizes two block storages of dual-bank dynamic random storing memory can distinguish the feature of independent operation, has proposed a kind of protected data when the undesired outage of computing machine and the method for unlikely loss.
See also Fig. 2.Figure 2 shows that the synoptic diagram of the computer system 20 of using method of the present invention.Computer system 20 adopts power supply unit 24.When power supply unit 24 normal power supplies, the transformer 251 that computer system 20 is comprised can boost the 5V direct supply back input power switcher 27 to control another transformer 252 employing 5V direct supplys, dual-bank dynamic RAM (dual-bank dynamic random access memory, dual-bankDRAM) 29 of the back supply computer system 20 of boosting again.When direct supply 24 interruptions or undertension, be not inconsistent the scope of defined and cause can't normal power supply, when power fail or shutdown, the present invention controls power switcher 27 can switch to battery 28 with the source voltage of transformer 252, with the power supply source of battery 28 as dual-bank dynamic RAM 29.And when Power supply detector 241 detects direct supply 24 generation problems, computer system 20 will produce look-at-me (INT) to south bridge 22.South bridge 22 can control CPU (central processing unit) 26 executive system management interrupt flow processs (system management interrupthandler routine, SMI handler routine) after receiving look-at-me (INT).This can consult method flow diagram shown in Figure 3 by CPU (central processing unit) 26 performed system management interrupt flow processs.
Because the method according to this invention, computing machine might enter system management interrupt flow process (as the step 300 among Fig. 3) because of undesired outage takes place in system, also might be known former thereby enter the system management interrupt flow process because of other; Therefore when the computing machine that adopts the inventive method enters the system management interrupt flow process, must check earlier whether computing machine undesired outage takes place, and adopts corresponding measure again with the safekeeping data.Relatively, when the present invention starts shooting after shutting down in undesired outage, also will implement corresponding inspection and operation steps again, the time preserve the data of getting off intactly to be taken at undesired outage.See also Fig. 3.Fig. 3 is the first of the method flow diagram of protection computer data of the present invention.
Step 300: the system management interrupt flow process begins;
Step 310: whether check to cause system management interrupt because of power fail; If then execution in step 320; If not execution in step 350 then;
Step 320: the value of protected data sign (Protective flag) is made as 1;
Step 330: the power supply of dual-bank dynamic RAM is switched to battery;
Step 340: the thesaurus bank1 of dual-bank dynamic RAM is made as self pattern (self refresh mode); Execution in step 360;
Step 350: the value of protected data sign is made as 0;
Step 360: finish.
At first, the system management interrupt flow process is the existing mechanism of existing computing machine.The present invention utilizes this existing system management interrupt flow process to add extra deenergizing circuit to excite a new system management interrupt signal; and when detecting undesired outage, producing system management interrupt login (SMI entry), the step with protected data proposed by the invention adds in the system management interrupt flow process again.Certainly, under existing computer organization, the system management interrupt login that causes except undesired outage that the present invention added, also have other situation can produce the system management interrupt login.Therefore, method of the present invention promptly when beginning system management interrupt flow process, checks whether be to open this system management interrupt flow process because of undesired outage.When undesired outage takes place, after computer system is shut down, the power fail working storage (PWR_FLR) in the south bridge will be set as 1 with as record.
The present invention utilizes the value of checking newly-increased electronic circuit state to check whether be because of undesired outage open system management interrupt flow process in the step 310 of flow process shown in Figure 3.If be checked through and unprovoked power fail and cause system management interrupt, undesired outage does not take place in expression, does not need the data in the special protection dynamic RAM.Therefore the value that is about to protected data sign (Protectiveflag) in the step 350 is made as 0; not protected with record data; and need not switch battery with supply dynamic ram power supply, because the data in the dynamic ram of shutdown back promptly do not need to have been preserved again yet.Wherein, the protected data sign can be certain the field that is defined among the RT CMOS; Also can realize it by other distinct methods or circuit.
On the contrary, be because of power fail causes if be checked through the system management interrupt flow process in the step 310, undesired outage takes place in expression, then need protect the data in the dynamic RAM, runs off to avoid significant data.Therefore step 320 value that is about to the protected data sign to the step 340 is made as 1, and the data among the database bank 1 of record Double Data storehouse dynamic RAM will be protected; And make the thesaurus bank 1 of dynamic ram enter the self pattern after the power supply of dynamic ram switched to battery; Because the data among the thesaurus bank 1 of shutdown back dynamic ram need continue to preserve, so need continue with the battery of computer-internal power supply is provided, and the power supply that thesaurus bank 1 can be provided with battery under the self pattern continues to preserve data.Wherein " self pattern " is a kind of operator scheme in the existing computer approach, originally be to be used for when computing machine enters battery saving mode or dormant state, make dynamic ram need not wait for that north bridge assigns access instruction, and make into control clock self to keep the data that it is held.The present invention utilizes this existing mechanism, uses instead when computer shutdown, and the power supply that the thesaurus of dynamic ram can rely on battery to be supplied, self is to continue to keep its data of holding.
As shown in Figure 3, method proposed by the invention can be when the undesired outage of computing machine, carrying out self, and then preserves the data in the dynamic ram safely with the battery supplied dynamic ram during shutdown.Yet when computing machine is started shooting once again, need the data that corresponding program is preserved when extracting shutdown, can avoid damaging the data that when shutdown, successfully are stored in the dynamic ram in the process of initiating hardware when start.See also Fig. 4.Fig. 4 is the second portion of the method flow diagram of protection computer data of the present invention.
Step 400: start;
Step 410: the value of check protection Data Labels; If 1 execution in step 420; If not be 1 execution in step 450;
Step 420: the thesaurus bank0 of initialization dual-bank dynamic RAM is to carry out Basic Input or Output System (BIOS) starting up self examination program (basic input/output system POST, BIOS POST);
Step 430: the system management interrupt flow process of initializing computer;
Step 440: Basic Input or Output System (BIOS) is closed the protection mechanism of storer and the thesaurus bank 1 of dual-bank dynamic RAM is stopped self;
Step 450: whole thesauruss of initialization dual-bank dynamic RAM are to carry out Basic Input or Output System (BIOS) starting up self examination program;
Step 460: the system management interrupt flow process of initializing computer;
Step 470: load operation system;
Step 480: finish.
According to the present invention, computing machine in when start will be in step 410 value of check protection Data Labels, check promptly before the start this time that whether computing machine is to shut down because of undesired outage.If the value of protected data sign is non-is 1, and then undesired outage does not take place computing machine before the expression start this time, but so computing machine execution in step 450 to 470, promptly general normal boot-strap program.Though undesired outage does not take place before, the present invention still in step 450 the complete dual-bank dynamic RAM of initialization (comprising thesaurus bank 1 and bank 0) to carry out Basic Input or Output System (BIOS) starting up self examination program (BIOSPOST); And in following step 460 initialization SMI, step 470 load operation system is to finish boot program.
Relatively, if find that in step 410 value of data protection sign is 1, system shuts down because of undesired outage before the start this time of expression computing machine; Then must obtain data among the thesaurus bank 1 that shutdown the time is stored in the dual-bank dynamic RAM with safety with program proposed by the invention.The present invention promptly utilizes two thesauruss of dual-bank dynamic RAM can distinguish the characteristics of independent operation at this, in step 420, only carry out Basic Input or Output System (BIOS) boot program (BIOS POST), thereby can keep the data that have among the thesaurus bank 1 of dual-bank dynamic RAM with the thesaurus bank 0 that when shutting down, does not have the dual-bank dynamic RAM of data.The present invention is initialization SMI in step 430 then, in step 440, make the thesaurus bank 1 of dual-bank dynamic RAM stop self afterwards again, because this moment, system management interrupt mechanism started and the next undesired outage of processing of having the ability, the thesaurus bank 1 of dual-bank dynamic RAM just no longer need preserve data with the self pattern.
As the step 420 of Fig. 4 to 470, the order that the present invention carries out with each step and have the function of further strick precaution loss data.For instance, if when computing machine start again after undesired outage, but at boot program undesired outage takes place again imperfect tense still; To not as good as once more switch to self pattern cause arduous data of preserving unfortunately to run off if the thesaurus bank 1 of dual-bank dynamic RAM has stopped self this moment.Yet method as shown in Figure 4, after the present invention is arranged in BIOS POST and finishes and behind the initialization SMI, the thesaurus bank 1 of dual-bank dynamic RAM just finishes the self pattern; Thus, even to any time point between the step 440 undesired outage takes place again in step 410, the thesaurus bank 1 of dual-bank dynamic RAM can also continue to preserve the former data of holding and treat to disengage safely behind the normal boot-strap next time again.And if undesired outage takes place after step 440, then finished all because of all start steps, method of the present invention can be carried out as the flow process as Fig. 3 again to preserve data in the thesaurus bank 1 of dual-bank dynamic RAM.
The method of protection computer data proposed by the invention, can arrange in pairs or groups under the present existing mechanism of computing machine hardware or software are to realize it.See also Fig. 5.Figure 5 shows that an embodiment synoptic diagram of the control circuit of the dual-bank dynamic RAM that method of the present invention adopts.The control circuit 50 of the dual-bank dynamic RAM that method of the present invention adopted connects control north bridge 11 and dual-bank dynamic RAM 13A and 13B respectively; Yet, south bridge of the present invention 12 in addition output signal with the control signal of north bridge to thesaurus 13A1 and thesaurus 13B1, respectively by carrying out and computing with door 541 and with door 542, the startup of using the protection mechanism by south bridge 12 control stores with close.That is to say; the present invention can be controlled the thesaurus 13A1 of dual-bank dynamic RAM 13A by south bridge; and the thesaurus 13B1 of control dual-bank dynamic RAM 13B enters the self pattern or finishes the self pattern, to realize the design of protected data of the present invention unexpected loss when the outage.For instance, BIOS can control south bridge and decide the thesaurus 13A1 that sends dual-bank dynamic RAM 13A to when start, and the control signal of the thesaurus 13B1 of dual-bank dynamic RAM 13B.When the control signal of sending when south bridge is 0 (logic low potential), thesaurus 13A1 and thesaurus 13B1 will keep the self pattern; And the control signal of sending when south bridge is when being 1 (logic high potential), and thesaurus 13A1 and thesaurus 13B1 will be decided by the control signal that north bridge is sent.Therefore can say, realize step 420 in the method flow of Fig. 4 with door 541 and with door 542.
In sum, the invention provides a kind of method of when the undesired outage of computing machine, effectively protecting data in the dynamic RAM, avoid the data damage or the loss that cause because of undesired outage.Method of the present invention is to utilize as existing mechanism such as dual-bank dynamic RAM, system management interrupt flow process and dynamic RAM self patterns; arrange in pairs or groups easy circuit and when detecting undesired outage, notify south bridge circuit, start the flow process of protected data to produce system management interrupt flow process login (SMI entry).The present invention and be set forth in computer booting after corresponding step, during shutdown, be stored in data in the dynamic RAM to disengage safely.The present invention can be applicable to that (Redundant Array of Independent Disks, computer organization such as RAID) are write the data of shielded thesaurus in the dual-bank dynamic RAM by upper strata decision more as independent magnetic disc poly array.But the present invention certainly also promotion and implementation preserve data with in undesired outage the time in multiple memory bank dynamic RAM (multi-bank DRAM).
The above only is preferred embodiment of the present invention, and all equalizations of being done according to claim scope of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (24)
1. method of protecting computer data, it comprises:
When computing machine enters the system management interrupt flow process, check whether power fail takes place;
If check and find power fail takes place, then set protected data and be masked as first value;
The power supply of the dual-bank dynamic RAM of this computing machine is switched to battery;
First thesaurus of this dual-bank dynamic RAM is made as the self pattern;
When this computer booting, check this protected data sign;
When this protected data is masked as this first value, second thesaurus of this dual-bank dynamic RAM of initialization;
Behind second thesaurus of this dual-bank dynamic RAM of initialization, this system for computer management interrupt flow process of initialization; And
After this system management interrupt flow process of initialization, first thesaurus of this dual-bank dynamic RAM stops self.
2. method according to claim 1, wherein second thesaurus of this dual-bank dynamic RAM of initialization is to carry out the Basic Input or Output System (BIOS) starting up self examination program of this computing machine.
3. method according to claim 1, it also comprises:
After first thesaurus of this dual-bank dynamic RAM stops self, the load operation system.
4. method according to claim 1, it also comprises:
When this computer booting, check this protected data sign;
When this protected data sign is non-when being this first value, this dual-bank dynamic RAM of initialization; And
After this dual-bank dynamic RAM of initialization, this system for computer management interrupt flow process of initialization.
5. method according to claim 4, wherein this dual-bank dynamic RAM of initialization is whole thesauruss of this dual-bank dynamic RAM of initialization.
6. method according to claim 5, wherein whole thesauruss of this dual-bank dynamic RAM of initialization are to carry out the Basic Input or Output System (BIOS) starting up self examination program of this computing machine.
7. method according to claim 4, it also comprises:
After this system for computer management interrupt flow process of initialization, the load operation system.
8. method according to claim 1, it also comprises:
When the undesired outage of this computing machine, setting the power fail working storage is first value.
9. method according to claim 8 is wherein checked the whether undesired outage of this computing machine when this computing machine begins the system management interrupt flow process, be the value of checking this power fail working storage when this computing machine begins the system management interrupt flow process.
10. method according to claim 1, it also comprises:
When the non-undesired outage of this computing machine, set this protected data and be masked as second value.
11. method according to claim 1, it also comprises:
When the undesired outage of this computing machine, beginning system management interrupt flow process.
12. a method of protecting computer data, it comprises:
When computing machine enters the system management interrupt flow process, check the whether undesired outage of this computing machine;
When the non-undesired outage of this computing machine, set protected data and be masked as second value;
When this computer booting, check this protected data sign;
When this protected data is masked as first value, second thesaurus of initialization dual-bank dynamic RAM; Wherein this first value is non-is this second value;
Behind second thesaurus of this dual-bank dynamic RAM of initialization, this system management interrupt flow process of initialization; And
After this system management interrupt flow process of initialization, first thesaurus of this dual-bank dynamic RAM finishes self.
13. method according to claim 12, wherein second thesaurus of this dual-bank dynamic RAM of initialization is to carry out the Basic Input or Output System (BIOS) starting up self examination program of this computing machine.
14. method according to claim 12, it also comprises:
After first thesaurus of this dual-bank dynamic RAM stops self, the load operation system.
15. method according to claim 12, it also comprises:
When this computer booting, check this protected data sign;
When this protected data is masked as this second value, this dual-bank dynamic RAM of initialization; And
After this dual-bank dynamic RAM of initialization, this system for computer management interrupt flow process of initialization.
16. method according to claim 15, wherein this dual-bank dynamic RAM of initialization is whole thesauruss of this dual-bank dynamic RAM of initialization.
17. method according to claim 16, wherein whole thesauruss of this dual-bank dynamic RAM of initialization are to carry out the Basic Input or Output System (BIOS) starting up self examination program of this computing machine.
18. method according to claim 15, it also comprises:
After this system management interrupt flow process of initialization, the load operation system.
19. method according to claim 12, it also comprises:
When the undesired outage of this computing machine, beginning system management interrupt flow process.
20. a method of recovering the data of being preserved when computing machine shuts down because of undesired outage, it comprises:
When computer booting, check that whether this computing machine shuts down because of undesired outage before start;
When this computing machine is when shutting down because of undesired outage before start, second thesaurus of the dual-bank dynamic RAM of this computing machine of initialization;
Behind second thesaurus of this dual-bank dynamic RAM of initialization, this system for computer management interrupt flow process of initialization; And
After this system management interrupt flow process of initialization, first thesaurus of this dual-bank dynamic RAM stops self.
21. method according to claim 20, wherein second thesaurus of this dual-bank dynamic RAM of initialization is to carry out the Basic Input or Output System (BIOS) starting up self examination program of this computing machine.
22. method according to claim 20, it also comprises:
After first thesaurus of this dual-bank dynamic RAM stops self, the load operation system.
23. method according to claim 21, it also comprises:
When the undesired outage of this computing machine, set protected data and be masked as first value;
Wherein check the whether undesired outage and to shut down be to check whether this protected data sign is this first value before start of this computing machine.
24. method according to claim 23, it also comprises:
When the undesired outage of this computing machine, beginning system management interrupt flow process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100229628A CN100524258C (en) | 2005-12-19 | 2005-12-19 | Method for protecting computer data |
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| CNB2005100229628A CN100524258C (en) | 2005-12-19 | 2005-12-19 | Method for protecting computer data |
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| CN1987834A CN1987834A (en) | 2007-06-27 |
| CN100524258C true CN100524258C (en) | 2009-08-05 |
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| CN103019885B (en) * | 2012-11-26 | 2015-05-27 | 大唐移动通信设备有限公司 | Method and system for monitoring embedded Linux-based hard disc bad track |
| CN103914364A (en) * | 2013-01-07 | 2014-07-09 | 宏碁股份有限公司 | Error detection device and method of solid state disk |
| CN105930238A (en) * | 2016-05-11 | 2016-09-07 | 浪潮电子信息产业股份有限公司 | Power supply system, power supply method and storage system |
Citations (3)
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| CN1403923A (en) * | 2002-10-21 | 2003-03-19 | 威盛电子股份有限公司 | DRAM data maintaining method and relative device |
| CN1460210A (en) * | 2001-04-25 | 2003-12-03 | 成津C&C株式会社 | Apparatus and method for protecting failure of computer operating system |
| US20040103343A1 (en) * | 2002-11-22 | 2004-05-27 | Wei-Jer Wu | Method and related computer for processing suspend to ram during power failure |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1460210A (en) * | 2001-04-25 | 2003-12-03 | 成津C&C株式会社 | Apparatus and method for protecting failure of computer operating system |
| CN1403923A (en) * | 2002-10-21 | 2003-03-19 | 威盛电子股份有限公司 | DRAM data maintaining method and relative device |
| US20040103343A1 (en) * | 2002-11-22 | 2004-05-27 | Wei-Jer Wu | Method and related computer for processing suspend to ram during power failure |
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