How to repair hard disk partition table and 0 track

　　0-Track Repair

The 0 track is in a very important position on the hard disk, and the primary boot record area (MBR) of the hard disk is in this location. The MBR is located on the hard disk's 0-track 0-cylinder 1-sector, which holds the hard disk Master bootstrapper and the hard disk partition table. In a total of 512 bytes of hard disk master boot record sector, 446 bytes belong to the hard disk master boot program, 64 bytes belong to the hard disk partition table (DPT), two bytes (55AA) belong to the partition end flag. This shows that the 0 track once damaged, will make the hard disk's master bootstrapper and partition table information is severely damaged, resulting in the hard drive can not bootstrap.

0 Track damage is one of the hard drive bad, but because its position is too important, so once damaged, it will have serious consequences.

The usual maintenance method is to fix it through the Pctools9.0 de (disk editor) (or a similar tool that can edit the disk sector) by using the following methods:

Start with the Windows9x boot disk and insert the disc containing the Pctools9.0. Run the PCT90 directory of De.exe, first into the "Options" menu, select the "Configuration" (Configuration) command, press the "space" key to remove readonly (read-only) front of the Check (Tab key switch), after the save exit.

Then select and execute the drive (drive) in the main menu "select", and in the "DriveType" (drive Type) item, select Physical (physical) and press the "tab" key to switch to the "drives" Item and select " Harddisk "(hard disk), finally, select" OK "and enter.

Then, back to the main menu, open the "Select" menu, the partitiontable (partition table) appears, select and enter, and then the hard disk partition table information appears. If the hard disk has two partitions, the L partition is a C disk, the partition is from the hard disk 0 cylinder started, then, the 1 partition of the Beginningcylinder (starting cylinder) 0 to 1 can be. Exit after saving.

Be aware that the important data on your hard disk is backed up before you modify it. Restart, press the DELETE key to go back to the CMOS settings, select "Ideautodetect", you can see the number of cyls than the original reduction of 1, after the Save settings and exit. Re-partition, format, you can save the hard drive.

It is important to note that because the De tool is only valid for the hard disk of the FAT16 partition, for the hard disk of the FAT32 partition, the FAR32 can be converted to FAT16 and then processed by disk tools such as the partition Master (PQ).

In addition, some people also discovered that by modifying the hard disk motor positioning system to change the 0 track position and through the circuit adjustment to change the head distribution logic, to reposition 0 tracks. Of course, this requires a deeper level of hardware, the implementation is also more complex.

　　Repair of partition Table corruption

The sector of the hard drive master boot record is also where the virus is focused, destroying the hard disk partition information easily by damaging the DPT (partition table) in the primary boot sector. Damage to partitioned tables is usually not physical damage, but partition data is corrupted. Therefore, it is usually possible to fix it with software.

Typically, after a hard disk partition, it is wise to back up a partition table to a floppy disk, CD, or USB disk. This aspect, the domestic famous anti-virus software rising provides a complete solution. In addition, the corresponding repair method is provided for hard drives that do not have a backup partition table, but the success rate is relatively low.

In addition, Chinese disk tool Diskman is also an expert in this area. Rebuilding a partitioned table is an "Assassin's killer" feature that is ideal for repairing partition table corruption.

For the hard disk partition table is severely damaged by the partition adjustment software (or virus), causing the hard drive and system to be paralyzed, Diskman can re-establish the partition table through the not corrupted partition boot record information. Select Rebuild Partition table on the menu's toolbar, and Diskman begins searching and rebuilding the partition. The Diskman will first search for the hidden sectors of the 0 cylinder 0 head starting from 2 sectors, looking for the partition table that has been moved by the virus. Next, search for the first sector of each head. The search process can take the form of either "automatic" or "interactive". Automatic retention of each partition found is appropriate for most situations. The interactive method gives a hint to each partition that is found, and the user chooses whether to keep it. When a partitioned table that is automatically rebuilt is incorrect, it can be searched interactively.

However, it should be noted that rebuilding partitioned tables does not fully repair partitioned tables, unless you have previously backed up the overly-partitioned table and then repaired the partition table for damage by restoring the previously backed up partition table. Therefore, it is necessary to back up a partition table at ordinary times.