CN101958134B - Data security protection method and device - Google Patents
Data security protection method and device Download PDFInfo
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- CN101958134B CN101958134B CN 201010201107 CN201010201107A CN101958134B CN 101958134 B CN101958134 B CN 101958134B CN 201010201107 CN201010201107 CN 201010201107 CN 201010201107 A CN201010201107 A CN 201010201107A CN 101958134 B CN101958134 B CN 101958134B
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Abstract
The invention discloses a protection method of data security and a device. The method comprises: an array adapter is arranged in a digital video recorder, the array adapter is connected with the digital video recorder through an expansion bus, and the digital video recorder is provided with a plurality of hard disks. The method further also comprises: the array adapter receives the data from the digital video recorder through the expansion bus when the digital video recorder needs to save the data, and calculates the save location of the data in the hard disks; and the data is saved in the calculated save location in a disk array mode. According to the invention, the data can be saved in the disk array mode, thereby avoiding the data loss of all the hard disks due to the fault of one hard disk, and effectively protecting the data in the hard disks.
Description
Technical field
The present invention relates to the digital hard disc video recorder technical field, particularly a kind of method of protected data safety and device.
Background technology
Digital hard disc video recorder (DVR) is the high-tech product that computer technology, network technology, digital video technology and conventional video, security and guard technology combine; Has high technology content; It is the regeneration product of DVD, magnetic tape type video recorder; Can be applicable to fields such as electric power remote monitoring, bank's guard monitor, intelligent building, home security monitoring, have vast market prospect.
At present, the polylith built-in hard disk is arranged usually in the DVR, 8 built-in hard disks can be arranged at most.When the information of carrying out write down, no matter built-in how many piece hard disks all were to adopt the mode of sequential write to preserve the video recording data.Along with continuing to increase of hard-disk capacity, the monolithic hard disk failure causes recording a video the probability of loss of data also in simultaneous growth.Like this, any hard disk failure all can make the data in this piece hard disk be destroyed overnight.How hard disc data effectively being protected, is the individual problem to be solved that has.
Summary of the invention
The embodiment of the invention is to provide a kind of method and device of protected data safety, effectively hard disc data is protected.
The embodiment of the invention provides a kind of method of protected data safety; Array adaptor is set in digital hard disc video recorder; Said array adaptor links to each other with digital hard disc video recorder through expansion bus, has the polylith hard disk in the said digital hard disc video recorder, and said method also comprises:
When digital hard disc video recorder need be preserved data, said array adaptor received the data from digital hard disc video recorder, the preservation position in hard disk of calculating said data through said expansion bus;
Array adaptor sends data to hard disk, and said data are kept on the said hard disk position that calculates through the mode of disk array.
Wherein, when needing the data of recovered failure hard disk, said method also comprises:
I) array adaptor reads the data on the last same strap of non-faulty hard disk;
Ii) according to the data computation that reads out be out of order on the hard disk with said non-faulty hard disk on data on the same strap;
Iii) with the said data Write fault hard disk that calculates;
Iv) repeating step i)～iii), the data in faulty hard disk all are resumed.
Wherein, said method also comprises:
The polylith hard disk that exists in the digital hard disc video recorder is constructed as array, creates storage pool;
Distributing said storage pool is several virtual disks; Wherein, the total volume of said virtual disk is smaller or equal to the storage pool total volume.
Wherein, the said polylith hard disk that is constructed as array is the part in the polylith hard disk or whole in the digital hard disc video recorder.
The embodiment of the invention also provides a kind of device of protected data safety; Array adaptor is set in digital hard disc video recorder; Said array adaptor links to each other with digital hard disc video recorder through expansion bus, has the polylith hard disk in the said digital hard disc video recorder, and said device comprises:
Preserve position calculation unit, be used for when digital hard disc video recorder need be preserved data, receive the data from digital hard disc video recorder, the preservation position in hard disk of calculating said data through said expansion bus;
Data are preserved the unit, are used for sending data to hard disk, and said data are kept on the said hard disk position that calculates through the mode of disk array.
Wherein, when needing the data of recovered failure hard disk, said device also comprises:
Data-reading unit is used to read the data on the last same strap of non-faulty hard disk;
The data computation unit, be used for according to the data computation that reads out be out of order on the hard disk with said non-faulty hard disk on data on the same strap;
Data recovery unit is used for the data Write fault hard disk that calculates said;
Judging unit, whether the data that are used for the failure judgement hard disk all are resumed, if then finish, if not then the notification data reading unit continues operation.
Wherein, said device also comprises:
Storage pool is created the unit, and the polylith hard disk that is used for digital hard disc video recorder is existed is constructed as array, creates storage pool;
The virtual disk allocation units, being used to distribute said storage pool is several virtual disks; Wherein, the total volume of said virtual disk is smaller or equal to the storage pool total volume.
Wherein, the said polylith hard disk that is constructed as array is the part in the polylith hard disk or whole in the digital hard disc video recorder.
Use the embodiment of the invention, through in DVR, increasing array adaptor, can preserve data through the mode of disk array, avoided a hard disk failure, the situation that causes the data in this piece hard disk all to be lost is effectively protected hard disc data.
And, because array adaptor can use the polylith hard disk simultaneously, improved data transmission rate.Array adaptor lets a lot of disc drivers transmit data simultaneously, and these disc drivers logically are disc drivers, so can reach the speed of several times of single disc drivers, tens times even hundreds of times.
Have again, owing to be that array chip in the array adaptor comes independently to accomplish calculating operation, thereby need not take the resource of CPU among the DVR, the processing speed of CPU in the DVR is had no influence.
Have again,, fault tolerance can be provided through data check.And common disk drive can't provide fault tolerance, and array adaptor fault-tolerant is to be based upon on the hardware fault-tolerant function of each disc driver, and the fault-tolerant check code of record on each hard disk is so it can provide higher security.
Have again, use the device that the embodiment of the invention provides, more flexible spatial partition functionality is provided.Array adaptor can be merged into a big storage pool with a plurality of little storage spaces, through the division again to storage pool, can reach more accurate allocation of space.
To sum up; For improving the video recording safety of data; The DVR of the band disk array function that the embodiment of the invention provided is on original DVR basis; Integrate raid-array (RAID, RedundantArray of Independent Disk) technology and preserve the video recording data, RAID1,5,6,50,60 grades of other protections can be provided.The array chip that array adaptor carries is carried out the RAID algorithm need not take master cpu resource among the DVR.Array adaptor use PCI-E interface is connected with DVR's.Support to connect 8 SATA hard disks, support hot plug, support big capacity hard disk.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention; To do to introduce simply to the accompanying drawing of required use among the embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the method flow diagram according to a kind of protected data safety of the embodiment of the invention;
Fig. 2 is the method synoptic diagram according to a kind of possible preservation data of the embodiment of the invention;
Fig. 3 is the method synoptic diagram according to a kind of possible restore data of the embodiment of the invention;
Fig. 4 is the method synoptic diagram according to a kind of possible managing memory apparatus of the embodiment of the invention;
Fig. 5 is the device logical organization synoptic diagram according to a kind of protected data safety of the embodiment of the invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Referring to Fig. 1; It is the method flow diagram according to a kind of protected data safety of the embodiment of the invention; In this enforcement, in digital hard disc video recorder (DVR), array adaptor is set, said array adaptor links to each other with DVR through expansion bus such as PCI-Express bus; Have the polylith hard disk among the said DVR, this flow process specifically comprises:
Need to prove that when needing the data of recovered failure hard disk, the said method of Fig. 1 can also comprise:
I) array adaptor reads the data on the last same strap of non-faulty hard disk;
Ii) according to the data computation that reads out be out of order on the hard disk with said non-faulty hard disk on data on the same strap;
Iii) with the said data Write fault hard disk that calculates;
Iv) repeating step i)～iii), the data in faulty hard disk all are resumed.
Need to prove that when needs carried out storage device management, the said method of Fig. 1 can also comprise:
The polylith hard disk that exists in the digital hard disc video recorder is constructed as array, creates storage pool;
Distributing said storage pool is several virtual disks; Wherein, the total volume of said virtual disk is smaller or equal to the storage pool total volume.
The above-mentioned polylith hard disk that is constructed as array is the part in the polylith hard disk or whole in the digital hard disc video recorder.
Referring to Fig. 2, it is that present embodiment specifically comprises according to the method synoptic diagram of a kind of possible preservation data of the embodiment of the invention:
11), at first DVR sends to array adaptor with data through the PCI-Express bus.
12), after array adaptor receives data, the array chip in the array adaptor independently calculates data, and this is kept on which position of which hard disk, i.e. the preservation position in hard disk of computational data.
Wherein, computing method are identical in concrete computing method and the existing disk array, no longer detail.
13), array adaptor sends the data of DVR to hard disk.
14), hard disk is preserved the DVR data in the position that aforementioned calculation goes out.
Thus it is clear that, use the embodiment of the invention, through in DVR, increasing array adaptor; Can preserve data through the mode of disk array; Avoided a hard disk failure, the situation that causes the data in this piece hard disk all to be lost is effectively protected hard disc data.
And, because array adaptor can use the polylith hard disk simultaneously, improved data transmission rate.Array adaptor lets a lot of disc drivers transmit data simultaneously, and these disc drivers logically are disc drivers, so can reach the speed of several times of single disc drivers, tens times even hundreds of times.
Have again, owing to be that array chip in the array adaptor comes independently to accomplish calculating operation, thereby need not take the resource of CPU among the DVR, the processing speed of CPU in the DVR is had no influence.
Referring to Fig. 3, it is the method synoptic diagram according to a kind of possible restore data of the embodiment of the invention, in the present embodiment; Suppose to have 3 hard disks in the DVR, be respectively hard disk 1, hard disk 2 and hard disk 3, on the every hard disk; The square frame of light color is a data block, and dark square frame is a check block; Wherein, the hard disk of hard disk 3 for inserting again after damaging, in order to recover the data in the hard disk 3, can adopt following steps:
21), the array chip in the array adaptor reads hard disk 1, the data A and the B of hard disk 2 same strap.
Wherein, the part that is gone out by a frame of broken lines among Fig. 3 is a same strap on the hard disk 1,2,3, and is visible, in hard disk 1,2,3, has many same strap.
22), the array chip in the array adaptor independently calculates the data AB=A XORB of hard disk 3.
Wherein, concrete computing method are identical with the method for the applied restore data of disk array in the prior art, and this paper no longer specifies.
23), the array chip in the array adaptor writes hard disk 3 with data AB.
24), repeating step 21,22,23 is until hard disk 3 data full recoveries.
Need to prove, be that example describes with data A, B more than, similarly; For example for the data D in the hard disk 3; Can calculate through the data CD in data C in the hard disk 1 and the hard disk 2, for example, D=C XOR CD; Concrete computing method itself are still prior art, and this paper no longer explains.
Thus it is clear that,, can data full recovery in the hard disk 3 be come out through said method.That is to say,, fault tolerance can be provided through data check.And common disk drive can't provide fault tolerance, and array adaptor fault-tolerant is to be based upon on the hardware fault-tolerant function of each disc driver, and the fault-tolerant check code of record on each hard disk is so it can provide higher security.
Referring to Fig. 4, it is the method synoptic diagram according to a kind of possible managing memory apparatus of the embodiment of the invention, in the present embodiment, supposes to have 3 hard disks in the DVR, is respectively hard disk 1, hard disk 2 and hard disk 3, and concrete management method can adopt following steps:
31), hard disk 1,2,3 is set up array, the establishment storage pool.
32), the memory allocated pond is several little virtual disks, wherein, virtual disk capacity summation is smaller or equal to the storage pool total volume.
Like this, through a plurality of hard disks are formed the huge storage pool of capacity; In storage pool, divide the virtual disk space and realized management memory device in continuation.
It is thus clear that, use said method, more flexible spatial partition functionality is provided.Array adaptor can be merged into a big storage pool with a plurality of little storage spaces, through the division again to storage pool, can reach more accurate allocation of space.
To sum up; For improving the video recording safety of data; The DVR of the band disk array function that the embodiment of the invention provided is on original DVR basis; Integrate raid-array (RAID, RedundantArray of Independent Disk) technology and preserve the video recording data, RAID1,5,6,50,60 grades of other protections can be provided.The array chip that array adaptor carries is carried out the RAID algorithm need not take master cpu resource among the DVR.Array adaptor use PCI-E interface is connected with DVR's.Support to connect 8 SATA hard disks, support hot plug, support big capacity hard disk.
The embodiment of the invention also provides a kind of device of protected data safety; Referring to Fig. 5; Array adaptor is set in digital hard disc video recorder; Said array adaptor links to each other with digital hard disc video recorder through expansion bus, has the polylith hard disk in the said digital hard disc video recorder, and said device specifically comprises:
Preserve position calculation unit 501, be used for when digital hard disc video recorder need be preserved data, receive the data from digital hard disc video recorder, the preservation position in hard disk of calculating said data through said expansion bus;
Data are preserved unit 502, are used for sending data to hard disk, and said data are kept on the said hard disk position that calculates through the mode of disk array.
When needing the data of recovered failure hard disk, said device can also comprise:
Data-reading unit (figure do not show) is used to read the data on the last same strap of non-faulty hard disk;
Data computation unit (figure do not show), be used for according to the data computation that reads out be out of order on the hard disk with said non-faulty hard disk on data on the same strap;
Data recovery unit (figure does not show) is used for the data Write fault hard disk that calculates said;
Judging unit (figure does not show), whether the data that are used for the failure judgement hard disk all are resumed, if then finish, if not then the notification data reading unit continues operation.
When needs were managed memory device, said device can also comprise:
Storage pool is created unit (figure does not show), and the polylith hard disk that is used for digital hard disc video recorder is existed is constructed as array, creates storage pool;
Virtual disk allocation units (figure does not show), being used to distribute said storage pool is several virtual disks; Wherein, the total volume of said virtual disk is smaller or equal to the storage pool total volume.
The above-mentioned polylith hard disk that is constructed as array is the part in the polylith hard disk or whole in the digital hard disc video recorder.
Thus it is clear that, use the embodiment of the invention, through in DVR, increasing array adaptor; Can preserve data through the mode of disk array; Avoided a hard disk failure, the situation that causes the data in this piece hard disk all to be lost is effectively protected hard disc data.
And, because array adaptor can use the polylith hard disk simultaneously, improved data transmission rate.Array adaptor lets a lot of disc drivers transmit data simultaneously, and these disc drivers logically are disc drivers, so can reach the speed of several times of single disc drivers, tens times even hundreds of times.
Have again, owing to be that array chip in the array adaptor comes independently to accomplish calculating operation, thereby need not take the resource of CPU among the DVR, the processing speed of CPU in the DVR is had no influence.
Have again,, fault tolerance can be provided through data check.And common disk drive can't provide fault tolerance, and array adaptor fault-tolerant is to be based upon on the hardware fault-tolerant function of each disc driver, and the fault-tolerant check code of record on each hard disk is so it can provide higher security.
Have again, use the device that the embodiment of the invention provides, more flexible spatial partition functionality is provided.Array adaptor can be merged into a big storage pool with a plurality of little storage spaces, through the division again to storage pool, can reach more accurate allocation of space.
To sum up; For improving the video recording safety of data; The DVR of the band disk array function that the embodiment of the invention provided is on original DVR basis; Integrate raid-array (RAID, RedundantArray of Independent Disk) technology and preserve the video recording data, RAID1,5,6,50,60 grades of other protections can be provided.The array chip that array adaptor carries is carried out the RAID algorithm need not take master cpu resource among the DVR.Array adaptor use PCI-E interface is connected with DVR's.Support to connect 8 SATA hard disks, support hot plug, support big capacity hard disk.
For system embodiment, because it is basically similar in appearance to method embodiment, so description is fairly simple, relevant part gets final product referring to the part explanation of method embodiment.
Need to prove; In this article; Term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability; Thereby make to comprise that process, method, article or the equipment of a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or also be included as this process, method, article or equipment intrinsic key element.Under the situation that do not having much more more restrictions, the key element that limits by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises said key element and also have other identical element.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the said method embodiment is to instruct relevant hardware to accomplish through program; Described program can be stored in the computer read/write memory medium; Here the alleged storage medium that gets, as: ROM/RAM, magnetic disc, CD etc.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.All any modifications of within spirit of the present invention and principle, being done, be equal to replacement, improvement etc., all be included in protection scope of the present invention.
Claims (6)
1. the method for a protected data safety; It is characterized in that; Be applied to digital hard disc video recorder, array adaptor is set in digital hard disc video recorder, said array adaptor links to each other with digital hard disc video recorder through expansion bus; Have the polylith hard disk in the said digital hard disc video recorder, said method also comprises:
When digital hard disc video recorder need be preserved data, said array adaptor received the data from digital hard disc video recorder, the preservation position in hard disk of calculating said data through said expansion bus;
Array adaptor sends data to hard disk, and said data are kept on the said hard disk position that calculates through the mode of disk array;
When needing the data of recovered failure hard disk, said method also comprises:
I) array adaptor reads the data on the same strap on the non-faulty hard disk;
Ii) according to the data computation that reads out be out of order on the hard disk with said non-faulty hard disk on data on the same strap;
Iii) with the said data Write fault hard disk that calculates;
Iv) repeating step i)～iii), the data in faulty hard disk all are resumed.
2. method according to claim 1 is characterized in that, said method also comprises:
The polylith hard disk that exists in the digital hard disc video recorder is constructed as array, creates storage pool;
Distributing said storage pool is several virtual disks; Wherein, the total volume of said virtual disk is smaller or equal to the storage pool total volume.
3. method according to claim 2 is characterized in that, the said polylith hard disk that is constructed as array is the part in the polylith hard disk or whole in the digital hard disc video recorder.
4. the device of a protected data safety; It is characterized in that; Be applied to digital hard disc video recorder, array adaptor is set in digital hard disc video recorder, said array adaptor links to each other with digital hard disc video recorder through expansion bus; Have the polylith hard disk in the said digital hard disc video recorder, said device comprises:
Preserve position calculation unit, be used for when digital hard disc video recorder need be preserved data, receive the data from digital hard disc video recorder, the preservation position in hard disk of calculating said data through said expansion bus;
Data are preserved the unit, are used for sending data to hard disk, and said data are kept on the said hard disk position that calculates through the mode of disk array;
When needing the data of recovered failure hard disk, said device also comprises:
Data-reading unit is used to read the data on the same strap on the non-faulty hard disk;
The data computation unit, be used for according to the data computation that reads out be out of order on the hard disk with said non-faulty hard disk on data on the same strap;
Data recovery unit is used for the data Write fault hard disk that calculates said;
Judging unit, whether the data that are used for the failure judgement hard disk all are resumed, if then finish, if not then the notification data reading unit continues operation.
5. device according to claim 4 is characterized in that, said device also comprises:
Storage pool is created the unit, and the polylith hard disk that is used for digital hard disc video recorder is existed is constructed as array, creates storage pool;
The virtual disk allocation units, being used to distribute said storage pool is several virtual disks; Wherein, the total volume of said virtual disk is smaller or equal to the storage pool total volume.
6. device according to claim 5 is characterized in that, the said polylith hard disk that is constructed as array is the part in the polylith hard disk or whole in the digital hard disc video recorder.
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| CN 201010201107 CN101958134B (en) | 2010-06-09 | 2010-06-09 | Data security protection method and device |
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| CN 201010201107 CN101958134B (en) | 2010-06-09 | 2010-06-09 | Data security protection method and device |
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| CN101958134B true CN101958134B (en) | 2012-09-05 |
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| CN101405691A (en) * | 2006-03-21 | 2009-04-08 | 国际商业机器公司 | Offloading disk-related tasks from RAID adapter |
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| CN101042633A (en) * | 2006-03-21 | 2007-09-26 | 国际商业机器公司 | RAID storage adapter, system and method for generating checking value |
| CN101042664A (en) * | 2006-03-21 | 2007-09-26 | 国际商业机器公司 | System and method for isolating a drive from disk array for diagnostic operations |
| CN101042922A (en) * | 2006-03-21 | 2007-09-26 | 国际商业机器公司 | Method for managing position of data in high density disk driver enclosure and disk array adapter |
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