This is one of the common hard disk failures in the process of computer use, and its performance is generally that the system sometimes directly displays "TRACK0BAD, DISKUNUSABLE", which means "zero track is damaged, and the hard disk cannot be used". When scanning other hard disks with ScanDisk, the red "b" of sector 0 is 35 1. Sector 0 of the hard disk is damaged, and everyone has a headache. Generally, hard disks are sentenced to death and are difficult to repair. However, for the case that the hard disk sector 0 is damaged, although it is tricky, it is not hopeless. In fact, some disk software can be reasonably used to shield the scrapped sector 0 and replace it with 1 sector, such as Pctools9.0 and ig NU8.
The zero track is in a very important position on the floppy disk of the hard disk, and the main boot recording area (MBR) of the hard disk is in this position. The MBR is located in the 1 sector of the 0-track 0 cylinder of the hard disk, and stores the hard disk master boot program and the hard disk partition table. Of the total ***5 12 bytes of the 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), and two bytes (55AA)K are in the partition end flag. It can be seen that once the zero track is damaged, the main boot program and partition table information of the hard disk will be seriously damaged, resulting in the hard disk not being bootstrapped. Zero-track damage is one of the bad tracks of hard disk, just because its position is too? It is necessary, so once it is destroyed, the consequences will be very serious. The usual maintenance method is to repair by DE (Disk Editor) of Pctools9.0 (or a similar T-tool that can edit disk sectors can also be used). Let's take a look at the maintenance method of this fault:
(1) Using DE to Repair Zero Trajectory
Prepare a system startup CD and a CD with PCtools9.0, which can also be downloaded from the Internet.
Step 1, use the boot CD to boot the computer into the DOS environment. Then put the PCtools9.0 CD into the CD-ROM drive, enter the directory where hDE is located and run DE, as shown in figure 1.
Step 2, the program prompts the software to run in read-only mode, and selects the "OK" button. The program prompts to open a file, because the purpose here is not to edit a file, and the software requires that a file must be opened when running, so you can choose to open a file here.
Step 3, because the changes to the disk must take effect, you need to cancel the read-only mode of the software. Press Alt to activate the menu, and use the arrow keys to select the menu Options-Configuration (StllO, as shown in Figure 2.
Step 4: Enter the setting interface, select "ReadOnly" with the "Tab" key, and then press the space bar to uncheck the "ReadOnly" check box, as shown in Figure 3.
Step 5, select the menu "Select"-"Drive", as shown in Figure 4.
Step 6, the "Select Drive" window appears. Select "Physical" in "Drivetype" and "HardDisk", then select "OK" and press "Enter", as shown in Figure 5.
Step 7: Select the menu "Select" and the menu item "PartitionTable" becomes optional, as shown in Figure 6. Select the menu item, and then press the "Enter" key.
Step 8, now you can see the information of the partition table. If the hard disk is divided into main partition and extended partition, then partitions 1 and 2 will have information. Of course, if there are multiple primary partitions, then 3 and 4 will also be displayed accordingly. All that needs to be modified here is the "BeginningCylinder" corresponding to partition 1. Move the cursor to the "BeginningCylinder" of the first partition and change the original "0" to "1", as shown in Figure 7. Of course, if the 1 track is broken, you can also enter "2" or even "3" here.
Step 9: Press Enter after modification, and select Save button in the dialog box that appears to save the modification, as shown in Figure 8. Then press the "Esc" key to exit the software.
Step 10, restart the computer, press the "Delete" key to enter the BIOS settings, and let the BIOS check automatically? Are you lying in pomelo? Sharp key blowing? Yilinder (cylinder) decreases 1, saves and exits. Re-partition and format the hard disk. At this point, the repair of track 0 of the hard disk is completed.
(2) Repair with partition magic.
Using PartitionMagician to repair the damaged zero track in the partition is mainly to divide the damaged space into separate partitions by adjusting the size of the partition, so that the logical zero track of the original partition moves forward or backward, and the data from the original partition is not affected.
Step 1, the startup disk starts the computer to enter the DOS environment, and then runs the partition Magician to enter its main window. Select the partition with zero track damage, and click the menu "Operation"? Resize/Move.
Step 2: In the pop-up window, use the mouse to display and drag the slider on the left side of the capacity ruler to reduce the partition, or directly manually enter the number of users assigned to the partition to clear the bad area, as shown in Figure 9. Click "OK" button after setting S. ..
Step 3, click the "Apply" button in the window to make the settings take effect, and then restart the computer win7 system.
Extended data 1
For the case that the hard disk sector 0 is damaged, the basic idea is to shield the damaged sector 0 as much as possible and replace it with 1 sector.
The ideal software for this work is the DE tool in Pctools9.0. The specific methods are as follows:
Starting from the Win9X startup disk, insert the CD containing Pctools9.0, and run DE.EXE in PCT90 directory. First, enter the options menu.
Select the configuration, press spacebar to remove the checkmark in front of read-only (press Tab to switch), save and exit.
Then select the drive option in the main menu; After entering, select Physical in the drive type.
Press the spacebar to select, then press the high key to switch to the drive item, select the hard disk, and then select OK to enter.
Then return to the main menu, open the selection menu, and the partition table will appear. Select and enter.
Then the hard disk partition table information appears. If the hard disk has two partitions, the L partition is the C disk, starting from the 0 cylinder of the hard disk.
Then, just change the starting cylinder of 1 partition to 1. Save and exit. It should be noted that,
Please back up the important data on the hard disk before modifying it. Restart, press the Delete key to return to COMS settings, and select "IDE automatic detection".
You can see that CYLS is less than the original 1. Save and exit, re-partition and format, and you're done.
Note: PCT00LS9.0 cannot run on the hard disk of FAT32 and Windows partition, but it can run on the hard disk of FAT 16.
After the repair, the hard disk must be re-detected, partitioned and formatted by CMOS.
Because only after the hard disk is formatted will the information of partition table be written into sector 1 (now sector 0).
Extended data 2
If the system prompts "bad track 0" when formatting the hard disk, it means that track 0 of the hard disk is damaged. Generally speaking, this kind of fault is difficult to repair, but we still don't have to give up, maybe there is still a chance.
In fact, the damage of track 0 is also a problem of bad track, but the key track 0 also has bad track. At this point, all we have to do is to re-mark the position of track 0. We can give this work to the PCTools 9.0 toolkit, in which we will use the DE.EXE command.
To modify the text of track 0, the read-only attribute of DE must be removed first, and the check box before read-only must be removed in the configuration. Then enter the drive type selection in the main menu and select the next level of physics? Hard disk. After entering, the partition table will appear in our main menu. Pay attention to the "starting cylinder", which represents the beginning of the 0 cylinder of the hard disk, that is, the position of the 0 track. At this point, everyone just needs to move a little and change it to 1 or 2.
It should be noted that the values here cannot be changed at will. Once the change is too large, the BIOS cannot correctly identify the hard disk. But the question is, what should I do if I change my position or not? Hehe, I can't think of a way at present. I hope everyone can have a chance to discuss it. If the luck is not too bad, then we can format the partition by hiding the bad tracks.