The machine restarts suddenly, partition and data are lost, please ask the reason

Don't be afraid that it's just a partition table error!

Hard disk MBR (Hard Disk Master Boot Record) and Hard Disk Partition Table Introduction Hard disk MBR is what we often call "Hard Disk Master Boot Record", simply put, it is a piece of data written in the absolute 0 sector of the hard disk by disk partition commands such as fdisk, it is composed of the main boot program, the hard disk partition table and the end of the sector flag word (55AA) These three parts, as follows: Components Number of bytes Contents and functions detailed description of the main boot area 446 Responsible for checking the hard disk partition table, Look for a bootable partition and be responsible for loading the bootable partition's boot sector (DBR) into memory; Hard disk partition table area 16x4=64 4 hard disk partition tables of 16 bytes each, which record the type, size, and location of each partition and the position where the partition starts and ends. The end sign block 2 always reads "55aa". The end of the flag area 2 is always "55AA", and the sum of the size of these 3 parts is exactly 512 bytes = 1 sector (each sector of the hard disk is fixed at 512 bytes), so people vividly call the MBR "hard disk master boot sector".

The other sectors on the hard disk track where this sector is located are generally vacant, and the hard disk track where this sector is located is not within the scope of the partition, and the content of the partition is followed by it (that is, if the number of sectors per track of the disk is 63, then the content of the partition is from the absolute 63 sector).

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There are several possible partition loss after booting:

Medium virus, pre-illness detoxification destroys the boot area of the hard disk, resulting in partition loss. Hard disk disk corruption, resulting in partition loss. The hard disk had bad sectors before regretting, and the bad sectors were not shielded in time, resulting in the bad sectors getting bigger and bigger, and finally destroying the boot area.

After repartitioning, the data in the partition will be lost, because repartitioning is equivalent to formatting the hard disk, it is better to back up the important files in it before partitioning the operation.

Partitioning operations are dangerous and the usual partitioning will lead to data loss, so it is better for us to take the help of third-party lossless partitioning software to complete the repartitioning.

1. Use the built-in disk management of Windows for partitioning, the disadvantage is that the data will be lost, so we need to back up the data ourselves.

2. Use third-party partitioning software for partitioning, and third-party software can generally achieve lossless partitioning, that is, data will not be lost.

Modify Hard Disk Partition:

A risky operation, some advanced hard disk management software supports splitting a hard disk partition into multiple partitions without losing files, but after all, "hard disk is valuable, data is priceless", for this kind of dangerous operation, it is recommended to back up the important data in the partition involved in the operation, and operate cautiously, just in case.

After repartitioning, all the data of the hard disk will automatically disappear, because the partition is to be formatted, and the formatting is to fully divide the track and data unit, in this case, it is almost impossible to recover even if you use a data recovery tool, and it should be said that it is impossible to recover it now.

When a disk is divided into several partitions, the first partition is the C drive, which is the outermost ring of the hard disk. That is, the fastest part of the hard drive. In this way, the file that the operating system is going to call is the fastest part, and the conclusion can be concluded that the system is the fastest to install in the first partition.

Friends, hello, this is because your computer system is damaged or lost very important files, so the computer system can not be started, there will be a press, r key recovery dialog box, generally this situation occurs, you can only one-click restore, or reinstall the system, now the general computer has a one-click restore, you try a one-click restore, your problem is solved, if there is no one-click restore, which can only reinstall the system. There are many ways to reinstall the system, such as optical discs, U disks, and other methods.

After the computer formatted the partition and divided it into two zones, the computer formatted the partition and divided it into two zones, and then restarted the computer and the words press any key to restart appeared, indicating that the computer could not read the hard disk or the local disk where the system was located was not activated. The steps to solve the problem are as follows:

First: Start the USB flash drive to reinstall the system and enter the PE system operation interface. Then double-click on the "Hard Drive Partition" software icon.

Second: Open the "Hard Drive Partition" software and delete all the partitions. Then repartition the computer hard drive.

Third: Repartition the computer hard drive: aFirst, separate the main logical partition of the computer, such as 40GB (that is, the local disk where the system is located).b.Then divide the partition into an extended partition, and do not modify the parameters of the partition at this time.

Fourth: In the extended partition, according to your own needs, the local hard disk is divided into d, e, f, g and other drive letters, and each drive letter is set according to its own needs.

Fifth, put the "primary logical partition" outside the extended partition in the "active" state. Finally, save the partition (at this point, the computer automatically formats each partition it has set up). Once the partition is saved, exit the software.

Sixth: Use Ghost XP or Ghost Win7 to install the system in the "main logical partition", which is what we often call C: disk. After installation, restart the computer, and at this time, you can correctly enter the system you just installed.

[Fault description] boot can not find the hard disk, tried a variety of methods to no avail, even DOS can not enter.

Solution(s)] 1.Mask the hard disk in the CMOS setup so that the machine can boot from the floppy disk.

2.Start the computer with the DM boot disk, start the DM Multi-Purpose Edition, and select"(a) dvanced options -m) aintenance

options -u) tilities utilities) -zero fill drive", zeroing the hard disk. You don't have to finish the zero charge, you can stop it by pressing the esc key as soon as the zero fill starts.

3.At this point, the hard drive is ready to be repartitioned like a new hard drive that has never been partitioned.

Enter the PE system, use DiskGenius to detect the hard disk, and try to recover the partition table.

After turning it on, in the last interface, take a picture to see.