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Hard drive as the main place for users to store data

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Hard drive as the main place for users to store data, and its biggest use than store data, but it is sometimes due to user mishandling, resulting in the loss of user data. If the average user, the data is not important relative to the user, then lost to lost, not so much; but if the data is very important to users (for such users should always back up data), then data loss how to do it? This article is through a process of recovery for hard disk data to a brief description of what the hard disk data recovery, and I hope you recover hard disk data can be helpful.

Related Concepts

MBR (Main Boot Record) that the master boot record area,battery for ACER Aspire 3680 it is located in the hard disk cylinder 0 track 0, sector 1, including the hard disk boot program and partition table.

DBR (Dos Boot Record) that the operating system boot record area, usually located in the hard disk cylinder 0 track 1, sector 1, is the operating system can directly access the first sector, it also includes a boot program and a program called BPB (BIOS Parameter Block) record parameters of the partition table. Each logical partition has a DBR.

FAT (File Allocation Table) file allocation table that is DOS, Windows9X file system addressing format for data security reasons, FAT generally made of two, the second for the first FAT FAT backup.

DIR is the Directory that is shorthand for the root zone, DIR immediately after the second FAT table.

Estimated cause of data loss:

1. Install multiple boot software, causing abnormal operation.
2. Was a virus infection. Loss of data before the state: 2.5GB hard disk, the original partition: C: 2GB + D: 500MB, D disk with important data.price of TOSHIBA PA3457U-1BRS battery Two partitions are FAT16 format.
The process of data loss
After a system reboot, D drive missing.
Operation after data loss
The client has to re-partition with Fdisk, trying to re-partition the original partition size, without success. But did not format the D drive, just format the C drive and reinstall the system.
Data recovery requirements of customers
Recovery under the root directory D “digital camera” all the files within the directory.

The tools:
NORTON DISK DOCTOR: diskedit.exe

Data recovery process:

First, the data backup of all the major sectors including physical Track 0, Track 0 of the logical partitions, FAT table and root directory area, etc., which together with GHOST backup data area of each partition.

Second, the analysis of the hard disk master boot sector MBR (including the primary partition table and boot loader), the partition boot sector DBR, FAT table and root directory area. As has been re-start the C partition and a smooth disk (aside virus reasons), so the MBR of the logical structure should be no problem, look through the Diskedit MBR command where the first sector of Track 0, confirmed that estimation is correct, but now with the original partition table is fully consistent with the partition table, it can not be determined.

Through the partition table, you can find the boot sector of the partition where the physical location analysis to determine the important data in C drive (boot sector, the first FAT table, the second FAT table,dell xps m1330 battery root directory area) are not abnormalities, but D-DBR boot sector in addition to, the above correspond to the other data are not, DBR no exception reason is that the results of re-zoning, and FAT1, FAT2 and root directory area beyond recognition because, generally should have two possibilities: First, partition is inconsistent with the original partition, resulting in the data do not add up; Second, the data has been destroyed by the virus.

MBR because look, they found the other sector of track 0 unknown process leaving the residual code, by looking at some of the display information, can be determined to leave some sort of multi-system software, and that too many customers have installed systems management software . This can generally be excluded from the virus may damage partition, the partition operating loss should be the exception due to multi-system management software.

Third, find the original partitioned according to the preceding analysis, the customer data loss after a re-zoning, and the estimated existing partition with the original partition is inconsistent,Dell LATITUDE D500 Replacement battery this would no doubt increase the difficulty of data recovery, but fortunately is not formatted D drive, because if only just Fdisk, rewrite the original hard drive only the first sector of each partition. If this sector does not fall on the important parameters of the original partition area (DBR, FAT, root directory), then the success rate of repair is pricey. The next step is to find the original D-important data zone. According to information provided by the customer can see, the original D under the root directory called “digital camera” subdirectory, so the search function provided by DISKEDIT, search for “digital camera” corresponds to the hexadecimal code, you can find the original D the root directory area. Lasted 30 minutes, by filtering search results, and ultimately find the root directory where the sector, and then follow it forward two FAT tables turn (based on experience about 400 sectors to 500 sectors) to find where the original D-DBR sectors, and then turn forward again 63 sectors, to find the original D drive partition table, thus, overcome the most difficult problems.

Fourth, the primary partition table reconstruction because the customer was using Fdisk primary partition table to re-establish the original partition table is not consistent, it must be manually rebuild the original partition table, find through the front of the original D drive partition table and the original D disk DBR, can calculate the primary partition table, including the district’s start time and end sector, partition size, partition type and so on. Calculated results, rewritten sector 0 track 1, the primary partition table (the computer automatically shut down.)

Fifth, reboot the system,battery for APPLE A1181 there the original D drive, basically all the recover all the files. Copy of the “digital camera” directory, make a backup. Notify the customer to retrieve data.

Description:

1. Data backup, do not over-confident GHOST, GHOST only recognize the right of the district, for it does not copy the hidden partition. The partition is not correct, it will report an error and stop the replication process. GHOST is not a pure sense of the overall copy software, copy only those files that exist on FAT table is not copied all the data on the disk!

2. Unfortunately for the customer to re-points D D than the original disk drive big just a few tracks, so the new D drive partition table is built in the original C-terminal of the data area. So basically this can be said that 100% of repair to restore the original data in D drive.

3. More lucky is that the customer does not have to reformat the D drive, otherwise there can be such a high recovery rate of the.

Recommendations to the reader

After the hard disk data loss occurs, immediately contact your local data recovery company. Best not to write to the hard drive, that would increase the difficulty of repair, also affected the success rate of repair.

Ten experiences to save hard drive

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Each user’s hard drive are stored a large number of useful data, while the hard drive is an easy to faulty parts. In order to effectively save the data in the hard disk, hard disk in addition to the preservation of an effective data backup outside of work, but also learn how to save hard disk failure, or extract useful data, to reduce losses to a minimum.

1, the system does not recognize hard drive

Such failures are more common, from the hard disk does not start, can not boot from A drive into the C drive, the use of CMOS in the automatic monitoring function can not be found in the presence of the hard disk. Most of these failures appear in the mouth of the port connector on the cable or IDE hard disk itself, the failure rate of small, can be re-plug the cable or change the hard disk and IDE cables be replaced oral test, where failure can be quickly found. If you do not recognize the new Dell Inspiron 6400 Battery hard drive connected, there is a common reason for this is the hard drive from the main line, if the hard disk connected to the IDE’s main location, the hard disk to skip the main coils, jumpers usually can not detect the error hard disk.

2, CMOS failure caused by

CMOS direct impact on the correctness of the normal use of the hard disk, this mainly refers to one of the hard disk type. Fortunately, the machines now support the “IDE auto detect” feature that can automatically detect the hard disk type. When connecting the new hard drive or replace a new hard disk should be set back by this feature type. Of course, some types of motherboards can automatically identify the type of hard disk. When the hard disk type error, and sometimes simply can not start the system, and sometimes be able to start, but it will happen to read and write errors. Such as hard drive type in CMOS is less than the actual hard disk capacity, the hard drive behind the sector will not be able to read and write, if it is a state of the individual multi-partition partition will be lost. There is also a major cause of the malfunction, the current logical arguments support the type of IDE hard disk can be Normal, LBA, Large and so on. If the normal mode, install the data, but to others in the CMOS mode, the hard disk read and write error occurs fault, because the physical geological mapping has changed, and will not be able to read the original location of the correct Canon lp-e8 Battery hard drive .

3, the master boot program startup failure caused by

Hard disk master boot sector is one of the most sensitive parts, including the master boot program is part of it, this section is primarily used to detect the hard disk partition program correctness, and to determine the active partition, is responsible for handing over the lead active partition DOS or other operating systems. This section will not damage the program from the hard disk boot, but after the soft areas or light areas on the hard drive read and write. Way to fix this fault is more simple version of DOS’s fdisk with the most highly convenient, as with the parameter / mbr run, will directly replace (override) the hard disk master boot program. In fact the hard disk master boot sector is the establishment of this program, fdisk. exe into the hard disk that contains a complete master boot program. Although the updated version of DOS, but the hard disk master boot program has not changed from DOS 3. There are currently winDOS 95 x to the DOS, so long as to find a DOS boot disk to start the system and run this program can repair. In addition, other tools like kv300 also has this feature.

4, partition table boot boot failure error

Hard disk partition table errors are serious errors, different errors might lead to different losses. If there is no active partition flag, the computer will not start. However, HP pavilion zv5000 battery soft areas or light areas on the hard drive after booting the system to read and write, you can reset the active partition by fdisk to repair. If it is a partition type error, can cause the loss of a partition. The fourth byte of the partition table values for the partition type, the normal bootable DOS partition larger than 32mb is the basic 06, the extended DOS partition value is 05. If the basic DOS partition type to 05 can not start the system, and can not read and write the data. If DOS does not recognize the 06 types of change such as efh, the DOS partition that is not a DOS partition to change, of course, can not read and write. Many people use a single partition realized the value of this type of encryption technology, to restore the original value of the correct type can make the partition back to normal. There are other data in the partition table to record the start or end address of partition. These data will result in damage or loss of the confusion of the Division, generally can not be manually restored, the only way is to use the backup data to re-write the partition table back, or from other conditions the same type and the same hard disk partition for partition table data, or other data will result in permanent loss. Master boot sector in the operation, and other software tools can be nu, the operation very convenient, can be directly on the hard disk master boot sector to read and write or edit. Of course, can be debug operation, but the complicated operation and has certain risks.

5, the effective partition of hard disk failure caused the error flag

In the hard disk master boot sector there is also an important part, that is, the last two bytes: 55aah, the word mark for the sector effectively. When from the hard disk, Dell inspiron 1525 Battery floppy disk or optical zone starts, will detect these two bytes are considered hard if there exists, or it will not recognize the hard drive. This flag will be transferred from the hard disk into the floppy disk rom basic or prompt. Can not be transferred from the floppy disk. Here for the entire hard drive encryption technology. Debug methods can be used for recovery processing. In addition, DOS boot sector is still a sign there, when the DOS boot sector, no boot logo, the system starts to appear as: “missing operating system”. The repair method can be used to fix the master boot sector, but addresses a different, more convenient way is to use the DOS system, the following general fixes.

6, DOS boot failure due to start

DOS boot from the DOS boot sector and the main DOS system files. System files include iosys, msdos.sys, command.com, which is a DOS shell command.com file, can replace other similar documents, but the default state is essential DOS boot files. DOS in Windows 95 systems carry, msdos.sys is a text file, is to start the windows to the document. But only do this when starting DOS file. But the DOS boot error, you can boot from a floppy disk or ibm thinkpad r60 battery CD-ROM, then use the sys c: to repair transmission system failures, including boot sector and system files can be automatically restored to normal.

7, fat table to read and write due to failure

record of the hard fat table data storage addresses, each file has a set of connection to specify its stored fat chain cluster address. fat contents of the file table means the loss of damage. Fortunately DOS system itself provides two fat table, if the current use of the fat table is corrupt, can be used to cover the second repair. However, due to different specifications of the disk of its fat length of the table and the address of the second fat table is not fixed, so the repair must be properly find its correct position, by a number of tools such as nu such repair itself, using also very convenient. Debug can be used to achieve this operation, that is, using the m command of the second fat at the table can be moved to the first table. If the second table is also damaged fat, you can not put the hard disk back to its original state, but the file’s data is still stored in the hard disk data area, can use the command chkdsk or scandisk to repair, and ultimately get *. chk file, which is the loss of fat chain sector data. If it is a text file can be extracted from the full document can be merged, if it is a binary data file, it is difficult to restore a complete file.

8, table of contents damage caused by lead failure

Table of records with the hard disk file name and other data, the most important of which is the starting cluster number of the file, directory table because there is no automatic backup function, so damage will be lost if the directory number of files. A method is also used to reduce the loss of chkdsk or scandisk programs above methods to search out from the hard disk chk files, table of contents damaged by the cluster number is the first loss for the damage in case of fat formed chk files are generally more complete file data, each chk file that is a Dell studio 1735 Battery complete file, to restore its original name to most of the documents.

9, accidentally deleted partition data recovery

When using fdisk to delete the partition, the surface phenomenon is the data in the hard disk has completely disappeared, without formatting the hard disk will be displayed when entering an invalid drive. If you understand the working principle of fdisk, you know, fdisk the hard drive just to rewrite the master boot sector (sector 1 0 0 plane) of the content. Specifically, to delete the hard disk partition table information, and any hard disk partition data are not changed, you can copy the partition table fix errors that find ways to partition table data recovery partition that can restore the original data, but only limited to the addition or re-partition after partition. If you have the partition formatted with the format, the earlier recovery partition, in accordance with the following methods of data recovery partition.

10, mistakenly formatted hard disk data recovery

High in the DOS version of state, the format operation format have been established under the default format for disk information recovery, in fact, the disk DOS boot sector, fat partition table and copy all the contents of the directory table to disk sectors in the last few (rarely used because of the back of the sector), the contents of the cheap sony batteries data area has not changed. This by running the “unformat c:” to restore the original file allocation table and the table of contents, thus completing the recovery disk information. Another DOS command also provides a miror disk for record of the current information for the recovery of formatted or deleted using this method is also more effective.

Repair Hard Drive Problems with Software

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Computer hard disk is one of the most important parts is the main place to store data, but because of the hard disk is magnetic media, the more vulnerable, like life and stability of the memory and other equipment as well, there will inevitably be used a variety of Sony NP-FS11 Charger problem.

For computer users, hard disk drive failure is simply a disaster. In the hard disk of all possible problems, physical damage to the sector (we often say “Bad Track”) is the most headache.

It can range from your computer crashes frequently, while in all the data you naught, and even early retirement may lead to the hard disk. At this point in addition to “repent,” but what else could it do?

After the hard disk have bad sectors, we generally use two methods to solve: one is to use HP pavilion dv6000 adapter software to hide these bad sectors, but more hidden causes the proliferation of bad sectors; Another way is to use low-level formatting method rewrite the disk interleaving factor, but life on the hard drive low grid have been affected. Is there a good easy way out?

Detect the hard disk bad sectors

Use the “Jinhai Shuo efficient source of hard disk damage test program” Software testing is very good hard disk damage. The primary function of the software on the target hard drive for bad sectors comprehensive testing and support all currently on the market IDE, SCSI hard drives, including IBM, Fujitsu, Maxtor, Quantum, Samsung, ExcelStor hard disk manufacturers such as products, but in the detection algorithm using a unique hard drive fast and nondestructive testing data.

The first step to create a boot disk: Once downloaded, insert a floppy disk to the floppy, and then double-click to run just downloaded soft6.exe file dialog box will pop up, click on “Generate Startup Disk” button. Designed to detect a hard disk bad sectors soon start making this a success. Note, however, “Jin Haishuo efficient source of Sony NP-FM50 Charger hard disk damage test program,” a special software program has been encrypted, or a DOS startup disk under the Wingdows can not view the contents, do not mistakenly formatted Oh!

The second step is to detect the hard disk bad sectors: use we have created a good boot disk boot system, boot automatically after a successful execution, the main program interface provides us with a variety of detection methods, such as comprehensive testing, advanced testing, bad sectors list , smart repair bad sectors, this time we should choose “full test drive” mode.

Detection process real-time progress bar will appear, it is convenient to the current position from view, has the time, remaining time and other information, and will show all detected the bad sectors sector, the percentage of the location, the cumulative bad sectors and other information, which time to record the relevant information immediately, when the test ended, press the F2 key to return to the software’s main interface, press the F5 key to display a list of hard disk damage.

Repair hard disk bad sectors

Software by using Dell Inspiron 1520 adapter HDD Regenerator to easily repair the hard disk bad sectors to achieve our purpose. HDD Regenerator is itself a powerful hard disk repair software, which uses a “reverse magnetized” works, forcing the head generated by the software instruction in the magnetic medium itself is the corresponding high and low level signals.

The reciprocating motion through multiple damaged or lost repeated magnetic sector plus magnetic hard disk, making the sector to regain the magnetic capacity of magnetic media to achieve through the repair bad sectors hard disk damage and regeneration of the ability to work hard to obtain the purpose of . And HDD Regenerator software also has the main interface is simple, very easy to operate features.
First to create a startup disk: Insert the floppy diskette with a good quality, double-click on the desktop Launch HDD Regenerator program shortcut, and then from the “Regenerator” menu and further select “Create Diskette” command, and follow the instructions step by step operation, special boot disk can be made only finished a while.

The second step is to scan bad sectors: Use this we just created boot disk to boot the system, the program will automatically detect the system’s hard disk, and the Sony NP-FR1 Charger software’s default is to scan from zero at the beginning of the track, it can be from any Position start testing the hard disk. If you know in advance the location of bad sectors can fill in the appropriate values to enter, so you can save time. If you need to stop the scan at any time when you press “Ctrl + Break” key combination.

The final step is to repair hard disk damage actions: First, we need to detect hard to determine, and the use of any key can enter the next step, we just have used Jin Haishuo efficient source of hard disk hard disk damage test program conducted a comprehensive inspection, Here you can directly type the location of bad sectors start, but for insurance purposes, or to fill the position of a little something more, and then press Enter both can be fixed. When the HDD Regenerator software scans your hard disk bad sectors on the progress bar will display a red “B” character, then begin to automatically repair will be repaired after the blue “R” character mark. After scanning and repair can be normal after the use of hard drive.

Should pay attention to the problems in use: the first because both programs are directed at the underlying operation of the disk is strongly recommended to do the data backup. Although the second HDD Regenerator software can also be run separately, but due to the dell inspiron 6000 adapter hard disk bad sectors can not know the number and exact location, using the time will be longer, so friends suggested combinations of these two software, it will be your best choice.

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