Various problems may occur when the hard disk is used for a long time, and the "bad track" of the hard disk is the most common problem. Besides the quality and aging of the hard disk itself, the bad track of the hard disk is mainly due to the fact that the hard disk is not treated well in use, such as too little memory, frequent access to the hard disk by application software, too many hard disk fragments, improper overclocking, poor power quality, high temperature, poor dust prevention, vibration and so on.

Hard disk bad track can be divided into logical bad track and physical bad track. The former is a soft track, usually caused by improper operation or using software, which can be repaired by software. The latter is a real physical bad track, indicating that there is physical damage on the track of your hard disk, which can only be solved by changing the use of the hard disk partition or sector. If your hard disk has the following phenomena, you should pay attention to whether the hard disk has bad tracks:

(1) When reading a file or running a program, the hard disk repeatedly reads an error, prompting information such as file damage, or it takes a long time to succeed; Sometimes even a blue screen appears;

(2) The hard disk sound suddenly changes from normal fricative sound to strange sound;

(3) After the virus infection is eliminated, the system can't start normally, and prompt messages such as "No sector found" or "General error in reading disk C" appear;

(4) format the hard disk, stop at a certain progress, and finally report an error, which cannot be completed;

(5) "ScanDisk" will automatically run every time the system is turned on to scan disk errors;

(6) When FDISK is executed on the hard disk, it will advance and retreat repeatedly at a certain progress;

(7) You can't boot the system through the hard disk when starting. You can go to the hard disk drive letter after starting with a floppy disk, but you can't enter it, and you can't successfully carry out the system with the SYS command. This situation is likely to be a problem with the boot sector of the hard disk.

If the above errors occur, you need to be more careful, which means that your hard disk has been broken!

Repair of bad tracks on hard disk

1. Fix bad logic tracks

Let's talk about the easiest way first. With the help of ScanDisk under Windows, select the drive letter in the Explorer and click the right mouse button. In the pop-up drive properties window, select (as shown in figure 1) (as shown in figure), set the scanning type to full scanning, select automatic error repair, and then click Start. According to the disk capacity and scanning options, the scanning time will be different (as shown in Figure 2) (as shown in Figure).

If there is a logical bad track in the system area, so it can't be started normally, we can use the startup disk of Windows 98/Me and type: Scandisk drive letter at the DOS prompt, and enter. Once the bad track is found, the program will prompt you whether to repair it or not, and choose to start repairing it. Many problems that Windows can't start normally due to bad logic in the system area can generally be solved by this method.

Because Windows 98/Me only automatically repairs logical bad tracks, not physical bad tracks, in fact, the method of 1 often fails. What should I do if I encounter a bad physical path?

2. Check the physical bad tracks with ScanDisk.

ScanDisk can't do anything about physical bad tracks. It can only mark it as a bad track and then stop reading and writing the area. Physical bad track is contagious and will spread to the periphery, which will cause the data stored near the bad track to be in danger.

When using ScanDisk, stop when bad tracks are found. Pay attention to the value when ScanDisk stops, such as 22%. Assume that the total capacity of the hard disk is 2GB, 2GB×22%=0.44GB, and the starting position of the bad track on the hard disk is roughly 440MB. Because the bad tracks on the hard disk are easy to spread to the periphery, it is necessary to leave enough buffers and set the capacity of the first partition of the hard disk to 400MB. The remaining 1.6GB is divided into 8 zones according to 200MB. Use ScanDisk to check all areas, and delete or hide areas that ScanDisk can't detect, so as to ensure that the system can no longer read or write these areas. The remaining adjacent partitions can be merged and used. Operations such as partitioning, hiding, deleting and merging can be carried out by using tools with graphical interfaces such as PartitionMagic or DiskMan.

3. Use software to hide physical bad tracks.

Use PartitionMagic5.0/6.0 to process hard disk. PartitionMagic can re-partition the hard disk, dynamically change the partition size, change the file format of the partition, hide or display the existing partition and so on without destroying the data. Copy the DOS version of PartitionMagic5.0/6.0 to the floppy disk, start the system with Windows 98/Me startup disk, and run the PQMAGIC.EXE on the floppy disk.

Then scan the hard disk, which can be done directly with the "Check" command under the operation menu in PartitionMagic. After marking the bad cluster, you can try to retest by selecting "Advanced/Bad Sector Retest"; "Under the operation menu. After the bad cluster is divided into one (or several) areas, the area containing bad tracks is hidden through the HidePartition menu item to avoid misoperation in Windows 98/Me.

Special note: If the bad track partition is directly hidden without formatting, some programs related to the drive letter will not run correctly in the subsequent partitions of the partition because of the change of the drive letter. The solution is to use the DriveMapper menu item under the Tools menu, which will automatically collect shortcuts and related information in the registry, and immediately update the drive letter parameters in the application to ensure the normal operation of the program.

4. Repair the bad track of hard disk sector 0.

Although it is tricky, it is not hopeless for the case that sector 0 of the hard disk is damaged. Here we introduce two methods to you.

The first method: we borrow DiskMan software to repair it. The specific method is as follows:

① Run DiskMan in pure DOS mode and select the drive symbol in the "Hard Disk" menu. At this time, the main interface shows that the hard disk partition format is FAT32, the starting cylinder is 0, the starting head is 1, and the total capacity is 2GB；.

② Then enter Tools → Parameter Modification (or press F 1 1) in turn, and in the pop-up dialog box for modifying partitions, change the value of the starting cylinder from 0 to1;

③ Press OK to return to the DM main interface, and press F8 to save the modification result. The hard disk needs to be reformatted after modification.

The second method: We use the DE tool in the Pctools9.0 software that some people are familiar with. The specific method is as follows:

① Start from the Windows 98/Me startup disk, run the DE.EXE in the Pctools9.0 directory, first enter the options menu, select Configuration, press the space bar to remove the tick in front of read-only (press the Tab key to switch), save and exit;

② Then select Drive in the main menu selection;

③ After entering, select Physical in the drive type item, press the space to select it, then press the high key to switch to the drive item, select the hard disk, and then select OK to enter;

(4) After returning to the main menu, open the selection menu, and then a partition table will appear. Select Enter, and then the hard disk partition table information will appear;

⑤ If the hard disk has two partitions, the L partition is disk C, and the partition starts from the 0-cylinder of the hard disk, then change the 0 of the starting cylinder of 1 partition to 1.

6. Save and exit;

⑦ Restart, press Delete key to enter COMS settings, and select "IDE automatic detection". You can see that CYLS is less than the original 1, save and exit, re-partition, format, and you're done.

Tip: Back up the important data on the hard disk before modification. Pctools9.0 cannot run on the hard disk of FAT32 and Windows partition, but it can run on FAT 16 hard disk. After the repair, the hard disk must be re-detected in CMOS, and then partitioned and formatted, because only after the hard disk is formatted will the information of the partition table be written into sector 1 (now sector 0).

5. Repair the low-level formatting of bad tracks

None of the above methods works, and you don't want to scrap the hard disk. You can consider using low-level formatting to deal with the hard disk failure. However, low-level formatting will re-divide tracks and sectors, mark address information, set cross factors and other operations, and it will take a long time to read and write hard disks. Every use will cause serious wear and tear on the hard disk, which is even worse for the hard disk with physical bad track. Practice has proved that low-level formatting will accelerate the scrapping of hard disks with physical bad tracks, but it is not necessary to use low-level programs as a means of repairing logical bad tracks. In addition, the low page will completely erase all the data on the hard disk, which is irreversible. Therefore, the low-level disk can only be used as a last resort, and the hard disk behind the low-level disk can only be used after advanced Format with the format command.