The partition is lost, that is, the partition information table on the hard disk is abnormal. When it is found that one partition or several partitions are missing, first check the status of the current hard disk, cooperate with the analysis of the reasons for the partition loss, and restore the partition back quickly and correctly.
First, check the current partition structure status of the hard disk through the Disk Manager. For the specific method, refer to "Checking the Basic Status of Storage Devices with WINDOWS Disk Management". The following situations are provided.
1. The hard disk has only 32G capacity and only recognizes partitions before 32G
Some old motherboards do not recognize hard drives larger than 32G. In order to take care of these "customers", most hard drives have a 32G capacity jumper setting. After setting, the hard drive ignores other capacities and only provides 32G space to the outside. When we set up the master and slave disks, we often fail to understand the jumper diagram clearly, set the jumper incorrectly, and set the hard disk to 32G state. In this way, we will only see the 32G capacity of the hard disk and the partition before 32G.
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Solution: Check the jumper, compare the jumper diagram and set it correctly.
2. The partition is hidden
There are not many examples of partition tables being hidden, but some users do encounter this situation. Because of some kind of virus destruction, software settings, Trojan destruction settings on the computer, etc., the partition logo is set to hidden, we can not see the partition from my computer.
Refer to the "Disk Partition Type Mark Table". Partition marks 06, 07, 0B, and 0C are FAT16, NTFS, FAT32, and FAT32 partition format marks. If the value is modified to 16, 17, 1B, and 1C, the corresponding partition is not affected. display.
3. Partition information table error
Most of the partition information table disorder is caused by external human factors. This phenomenon is rarely caused by natural faults.
The common reason is that two devices (hard disk or optical drive) are connected to an IDE hard disk line at the same time, and the master-slave jumper settings of the two devices conflict, resulting in data confusion and the partition information table is rewritten.
Some friends will also find abnormal partitions during the installation of the operating system, including cloning Ghost actions, system restore actions, etc., which are common reasons for partition loss or abnormalities. Please refer to the recovery of hard disk partition table for the solution.
Another common phenomenon is that the NTFS partition logo information 07 changes to 42, that is, it becomes a dynamic partition, so that the partition will not be displayed on the computer. For such failures, we only need to change the NTFS partition logo bit 42 to the normal 07.
4. Hard disk bad sectors (bad sectors)
The hard disk partition table is a chain structure. If the hard disk is aging or collided due to bad tracks, these bad tracks are just in the middle of the hard disk partition table chain, and the subsequent partitions will not be recognized by the system. If sector 0 is bad, all sectors will not be recognized and displayed.
The solution is to use Mhdd to check the bad sectors. If the number is small, you can use Mhdd to repair the bad sectors directly, and then use the recovery partition and partition table method to recover the partition. When there are many bad sectors, we can only mirror the source disk to be restored, and then perform partition and data recovery on the mirrored disk.
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