Explain in Detailed the Data Recovery Technology from Theory to Practice

Related knowledge of Disk data format
Each of these reasons could lead to the data on the disk or diskette damage or loss, make parts (or all) data can not read and use. Data recovery is to use all kinds of software and hardware technology and methods to retrieve the data, make valuable information may be reused.

Say to the data recovery, we have to mention hard disk data structure, the document storage principle, and even operating system startup process, are these your hard disk data on the recovery must be used when the basic knowledge. Even if you don't need to recover the data, to know that these knowledge (even if it's just a little bit more know some), to you the usual computer operation and application is also helpful.

Hard disk files system structure

Buy a piece of hard disk early, there is no way we use, you will need to set it division, formatting, and then install on the operating system can use. Had we have been used to now Win9x/Me series for, we generally want to hard disk into the Lord will boot sector, operating system boot sector, FAT table, DIR directory area and Data Data area five parts, etc. We usually said Lord boot sector MBR in a hard drive is the only, the content in the hard disk MBR only start to read the content, and then stay memory. Several other item with your hard disk partition Numbers

We all may meet such thing, the morning just empty the dumpster, afternoon but suddenly remembered one file is particularly important, how can I do? And May system is virus damages, hard disk partition table or file distribution list has been rewriting the virus, but with a hard drive you years of painstaking care. At this time we need to restore data, and the domestic many specialized in data recovery of business professional company. But our hard disk file was mistakenly delete happened, division lost, virus damages the and so on, through some data recovery software themselves can be solved. Here is elaborate data recovery principle and some commonly used data recovery method.

Hard disk data storage principle

Hard disk is a kind of the magnetic medium of the data storage equipment, data stored in sealed in clean hard drive some of the inner cavity disk. These blanks in general is in as the main components of the aluminum base surface besmear formed by the magnetic media, in every aspect of the disk, with the rotation axes to the axis, with certain magnetic density of the spacing of the several concentric circles was divided into track button. Track reads changes corresponding), each track and is divided into several sectors (sector), according to the data stored in the sector on the hard drive. In each side in a read/write head accordingly (head), so all the same position different head's track constitutes the so-called cylinder (cylinder). Traditional hard drive in reading and writing cylinder, head, sector for addressing the way (CHS addressing). Hard disk in the power to keep after high rotation speed (5400 r/min above), is located in the head arm head suspended in the disk surface, can through the stepping motor in different cylinder to move between, to a different cylinder for reading and writing. So in power if by violent oscillation during hard drive, disk surface is easy to be scratched, head also easy to damage, it will give the data stored on disk catastrophic consequences. When you want to recover deleted files, you can try the Mac Data recovery software, is an overall Mac data recovery software which can help you recover Mac data from lost, deleted, logical corrupted and many other unknown reasons data loss



Attention Matters Hard Disk Use and Maintenance

The disk is the height of the electromechanical integration precision equipment, although now hard drive impact resistance greatly improved, but for security and insurance must be gentle; when installed in the hard the host of four fixed bit should use the screw is firm. After startup absolutely can't move the host. Shutdown 1 minutes after the hard drive motor stopped, can move, this also is the original little hard disk special have a head position program, providing handling machine use reasons. Hard drive is shining lights do not without electricity shutdown, such operation may damage the hard disk. Software phenomenon average performance is operating system lost, not the normal starting system, disk reading and writing mistake, can't find the required file, the file can't open, file to open garbled, no zoning, suggests a hard disk partition no format etc. This Mac Photo Recovery Software is compatible with Memory Sticks, SmartMedia, Micro Drives, SD Cards, xD Cards, PCMCIA, Floppy Disks, etc. Simply insert your Digital Film into the reader and run Photo Recovery for Mac on the media and then save the photo or Pictures off to another location. if you are windows user, you can also choose Data recovery software to recover your lost data.

Hard disk information and hard disk data recovery

In the hard drive CMOS stored information In the computer, basically have hard disk type, capacity, cylindrical number, head count, each sector number, addressing mode content, to the hard disk parameters to illustrate so that the computer hard drive right access. When CMOS power lost or for an error, hard disk Settings may be lost or error, hard disk access is not correct. This kind of situation we have to reset the hard disk parameters, if have prior down hard disk parameters or have some anti-virus software prior backup CMOS information, need to hand back can; Or you can also use the BIOS setting (setup) of the "automatic detection hard disk type" (HD type auto detection) function, general also can get the right result.

HDD failure may generally be divided into soft and hard fault fault two kinds big, specific have hard disk operating system is damaged, hard disk the Lord direct area are destroyed, FAT crewmen were destroyed, CMOS hard disk parameters is not correct, hard disk controller and hard disk drive failed to properly connect, hard disk drives or hard disk controller hardware failure, mainboard failure, etc. For example: