Methods you must known about hard drive data recovery

There will be data loss if the hard disk got damaged. Here are some means of data recovery under different situations.

1. Computer system doesn’t recognize the hard disk.

This situation is very common. You can’t start the hard disk, can’t start from the A disk into the C drive, and can’t find the existence of hard drives even using CMOS in a automatic monitoring function. The vital failures are appeared in connection cable or IDE port generally, you can re-plug the hard disk cable, IDE or cable for testing, and you will soon check out the failure of this situation.

2. Caused by the CMOS.

The CMOS can affect the normal use of hard drive directly. When we use a new hard drive, we will re-set its type. Some times the types of hard drive can be identified by the motherboard automatically. If there is something wrong with the type of hard disk, the program can’t be started, or can’t read/write correctly.

3. Start up failure caused by the main boot program.

The master boot sector is a more sensitive part in hard disk, which contains the master boot program. The master boot program is used to detect the correctness of the hard disk partition, and check the active partition. If this program Damaged, the hard disk there will can’t be booted. However, you can read and write it from the floppy disk drive or the CD-ROM.

4. Booting Trouble caused by partition table error.

Partition table error can be considered as serious hard disk error. Different degrees of error will causes varying losses. The computer can’t be started if there is no active partition icon, but you can read/Write the hard disk by using floppy disk drive or CD-ROM’s guide system. And you can reset the active partition through FDISK, single partition’s data loss could be aroused by its type error. Some data in Partition table used to record the beginning and end of the partition address, if they got damaged, the partition will get confused or loss. And this problem can’t be fixed by manually restore, the only way is to re-write using the backup partition table data, or get partition data from partition with the same type and status, otherwise it will lead to the permanent loss of other data.

5. Hard disk failure caused by partition’s valid flag error.

The last two bytes, 55AAH is an important part in the hard disk master boot sector. It is sector’s valid icon. when the hard disk, floppy disk or optical zone starts the two bytes will be detected, if the icon’s existence could be considered as there has a hard disk, otherwise the hard disk will not be recognized , the icon will transmitted from Hard disk to rom basic or a note of put into floppy disk will be prompt.

Therefore, we know that there are many different situations for hard drive data loss, because the hard disk is very vulnerable to be damaged. once the hard drive got damaged, it will be very prone to data loss. If you can’t fix there kind of problem by yourself, you can consult the engineers in Hdata Recovery Software.