Hard disk failure repair techniques-2

Physical bad sectors hard drives

If you have DOS can go to C drive, while the hard disk is not working properly, it is likely to be the hard disk has bad sectors occur. In general, the hard disk bad sectors can be divided into the logical bad sectors and physical bad sectors. Generated when the logical bad sectors are generally not seriously affect the use, it is likely to be the physical bad sectors.

Physical bad sectors we are dealing with the core idea is to cluster these are bad sectors into a single partition, and hide to avoid the other programs call, so that you can prevent the proliferation of bad sectors, so as to avoid greater losses. For this processing, we mainly use Partition Magic6.0 this software under DOS.

In the DOS interface into the PQ 6.0, we first used under the Operations menu, Check For Errors command to determine the physical location of bad sectors, because PQ6.0 this feature very well, unlike Windows, the Scandisk as often misdiagnosed.

PQ6.0 the real power lies in its ability to cluster all the possession of bad sectors marked with a special calibrated out, and you can select all of these bad clusters, and then they are divided into a separate new partition. This is a graphical operation, it is very convenient. Subsequently, we should bear in mind that hidden partition is full of evil, so as to ensure that it will not be called. At this point the use of Advance under the Hide Partition menu commands can be achieved.






After possession PQ6.0, physical bad sectors are really not difficult to solve, and can effectively prevent proliferation. But should be noted that, in any event, this time the hard disk is already in sub-healthy state, in which the data is still very dangerous. PQ6.0 after treatment with the physical bad sectors, what piece of the hard disk is also difficult to say how much time, it depends on luck.

Low-level DOS boot failures - lock logic

Hard logic of lock is a very common means of mischief. In a logical lock, regardless of whether the use of any equipment does not properly boot the system, or even floppy disks, optical drives, hard drives are the same double-hung has no effect.

To solve the problem logically locks, we should know the root of the problem. In fact, DOS system startup, it will search all Logical disk order. First, find the master boot sector of the partition table information, it is located in the hard disk of the zero-zero-cylindrical head of the first sector of OBEH address of the beginning of the, when the partition information for the beginning of the 80H that is the main boot partition, the other for the extended partition, the primary boot partition is defined as the Logical disk C drive, and then search for the extended partition Logical disk, is defined as the D drive, and so find the E, F, G ... ... logic of the lock is in this start with, modify the the normal primary boot partition record, will be the first one extended partition points to itself Logical disk, DOS at boot time to find to the first one Logical disk, the search for the next Logical disk is always to find their own so that a loop is formed .

For such problems, if you do not want the data on the hard disk, then deal with them very readily. We can all IDE interface in the BIOS will set NONE, then use the floppy disk to start the system, this time can certainly start, because the system simply do not drive. Then, we use the classic hard drive management software, DM has. As the DM may not rely on the motherboard BIOS to recognize the hard disk, so you can use DM to partition formatted so that we can completely solve the problem, and fail-safe, simple and convenient, the only regret is that the data retain his job.

There is also a way is also very worthy of recommendation, it can keep the hard drive data. First, to prepare a boot disk, and then in a normal machine, using a binary editing tool you're familiar with (UltraEdit, etc.) modify IO.SYS file on the floppy disk (remember to change the document before the amendment of the properties of normal), the specific Search in this document inside the first one "55aa" string to find the future value can be modified for any other. This modified system with the floppy disk you can be locked with a smooth hard drive started. However, the normal time due to the hard disk partition table has been damaged, you can not use FDISK to delete and modify the partition, but now can use the above to restore the partition table on the way to deal with.

Hard disk failure repair techniques-1

As a storage device in a hard drive plays an extremely important role. However, due to the hard disk are magnetic media, so its life expectancy and stability of the memory and other devices not as good as when using all kinds of problems would inevitably arise. And make the situation more complex, due to the hard disk to the system involves setting the bottom, they are often not familiar Windows, resolve the problem, go to DOS must be dealt with under the terms of that for a lot of DIY novice a bit at a loss, and after all they have not experienced the DOS era.

Hard drive problems before the general symptoms of

If the hard disk fails, then the best early detection and timely take corrective measures. If you wait until the terminally ill, the hard disk of your valuable data is difficult to escape the. In general, the hard disk fails, there will be the following performance:
1. S.M.A.R.T failures prompt appears. This is a hard drive built-in hard drive manufacturers themselves inside the auto-detection feature is at work, there are prompted to describe your hard drive that have the potential physical failures, and soon there will not be running from time to time in the case.
2. In the Windows initialization crash. This situation is more complex problems should first rule out the possibility of other components, such as memory, poor quality, fan stall cause system overheating or damage caused by viruses and so on, finally if it is determined if the hard disk failure, and then dealt with separately.





3. Be able to enter the Windows system, run the program, but an error can not run disk scans, often slow and stagnant or even crash when scanning. This phenomenon may be hard drive problem, it may be Windows constant, daily soft fault, if the software is set to exclude the possibility of problems, you can certainly have the physical failure of the hard disk.
4. To enter Windows, run the ScanDisk found an error or even bad sectors directly, which does not need me to say, Windows will be a detailed inspection procedures for reporting.
5. In the BIOS suddenly could not distinguish between the hard disk, or even to identify, but also the operating system can not find the hard disk, which is the most serious failures.

Unfortunately, the great fortune - the destruction of the partition table

First, we should recognize the hard drive power interface and data lines do not fall off, and then enter the BIOS, use the "HDD Auto Detect" to detect the hard disk. If the BIOS can correctly identify the hard drive at this time, then at least your hard drive there is hope of treatment; Otherwise, I think we have no fuss, because I think our average DIYer tool at hand is essentially powerless.

In UltraEdit Find "55aa" String

CD-ROM or floppy disk boot system, you can try to enter the C drive letter, if you are prompted at this time can not find the C drive, then definitely be a good thing. This occurs is likely to be the hard disk partition table information has been destroyed, or are some kind of virus attack. If the hard disk for your data does not matter, you can first use FDISK / MBR command to unconditionally remove the contents of the partition table, and then use FDISK and other partitioning software to re-format the partition, generally this way we can solve the problem; and if you still need the hard disk the data, then the steps to take some work. The best time to have a kill-virus software or a motherboard with a gift related software, and then you can refer to the help documentation, generally the software will contain the command to restore the hard disk partition table, but also extremely easy to use.

For there is no antivirus disk users, we can use the NU 8.0 in the NDD repair, it will check the partition table errors. If it is found wrong, NDD will be asked if you are willing to modify, as long as you continue to answer YES you can correct errors, or the partition table with the backup off-line coverage of it.

Can be achieved with the Hide Partition

If the above method does not solve the case, can also use FDISK to re-partition, but the partition size must be the same as the original partition, which is especially important not to carry out high-level format, after partition, but use NDD to repair it. This will not only ensure that the hard disk can be repaired after the start, but the data on the hard disk will not be lost.