Routine maintenance of the hard disk-2

Fault 1: The system does not recognize hard drive

The system can not boot from the hard drive from the A disk can not boot into the C drive, use the CMOS the automatic monitoring function can not be found in the presence of the hard disk. Most of these failures appear in the connecting cable or IDE port on the hard disk failure is unlikely in itself and can be re-plug hard drive cable or change IDE port and cable to replace the test, you'll quickly find fault lies. If the new hard drive is not connected to be accepted, a common reason is the master-slave jumpers on the hard disk, if an IDE hard disk online access two hard disk drives, it is necessary to distinguish the relationship between master and slave.


Troubleshooting 2: the hard disk can not read or write, or can tell

Such failures are generally due to failures caused by CMOS settings. CMOS in the hard disk drive a direct impact on whether or not the correct type of normal use. The machines are now supported "IDE Auto Detect" function can automatically detect the hard disk type. When the hard disk type error, and sometimes simply can not start the system, and sometimes be able to start, but it will read and write error occurred. Such as CMOS, the type of hard drive is less than the actual hard disk capacity, then the hard drive behind the sector will not be able to read and write, if it is multi-regional state of the individual partitions will be lost. There is also a major cause of the malfunction, since the current logical arguments support the type of IDE hard disk can be used "Normal, LBA, Large", etc., if the normal mode, installed the data, but in the CMOS, replaced by other models , the hard drive read and write errors occur failure, because the mapping relationship has changed, and will not be able to read the original location of the correct hard drive.






Troubleshooting 3: The system can not start

For this failure is usually based on the following four reasons:
1. Corrupted master boot program
2. Partition table is damaged
3. Division of effective bit error
4. DOS boot file is corrupted

Which, DOS boot file is corrupted most simple, using a boot disk boot, after a boot file to the system transfer on it. Master boot program significant bit of damage and damage to the general area can also be used FDISK / MBR to solve a mandatory override. Partition table is damaged is more trouble, because they could not identify the partition, the system will not partition the hard disk as a bare disc treatment, resulting in some software not work. However, there is a simple way - using Windows 2000. Finding with Windows 2000 systems, the damaged hard drive Guashang Qu, boot, due to Windows 2000 in order to ensure the stability of the system hardware will have a new hard disk to scan Jieshang Qu. Windows 2000 hard disk scanning program CHKDSK corrupted for various reasons, have a good repair capacity hard drive, scanning finished basically repair a hard drive.

There is also a form of partition table is damaged, here I refer to "zoning map", the specific performance of the emergence of an active partition and the same partition. Including the same file structure, content, partition size. If the content in any area of the district made a change, will be reflected in another place, seems to be the same as the shadow map. I have come across before, 6.4G hard disk into a 8.4G (mapping of the 2G C-Zone). This problem particularly awkward, this problem does not affect the use, not the words will not fix problems, but to repair, NORTON of DISKDOCTOR and PQMAGIC all had become illiterate, to partition the hard disk capacity and the actual size of the overall inconsistency turned a blind eye No problem, you mouthful perfunctory. Tackle this problem, only the GHOST coverage and use NORTON rescue disk to restore the partition table.


Fault 4: hard disk bad sectors

This is a shocking and feared word. Recently, IBM word of mouth and therefore diminish quickly. When you use the system comes with Windows system ScanDisk SCANDISK scan the hard disk when prompted to say the hard disk may have bad sectors, and then flashed a horrible blue, Xiao Huang box one by one slowly stretching open, then, been in a box marked with a "B" ... ...


In fact, most of these bad sectors is a logical bad sectors, it can be fixed. Obviating the need for repair (it is said the reason why development of self-test tool vendors is that they succumb to repairing the hard disk is simply a good half of this "brutal" fact).

So, when there is such a problem, how should we deal with it?

Once with the "SCANDISK" If the program prompts when scanning the hard disk has bad sectors, first of all we should re-use of the brand drives its own self-inspection procedures for a full scan. Note, do not select quick scan, because it can only detect about 90% of the problem. In order to assure themselves, in that more time is worth it.


If the check result is "successful rehabilitation", that can determine the logical bad sectors, you can shoot each of the offerings of breath; If not, then there is no possibility of repair, if your hard drive is also shelf-life, that it quickly to replace the bar.


As the logical bad sectors merely been marked cluster number will no longer be assigned to the files use the. If it is the logical bad sectors, just reformat the hard disk on it. However, in order to prevent a possible drop formatted phenomenon (because the cluster has made a mark on a number that is a bad cluster, formatting program may not check on the acceptance of this "reality", then discard the cluster), better re-partition, use the such as the IBM DM sort of software is still quite fast, or GHOST coverage can be, but both programs are more or less to lose some data.

Fault 5: Hard disk capacity and the nominal value is clearly incompatible with

In general, the hard disk formatted capacity will be less than the nominal value, but this gap will not be more than 20%, if the two differ greatly, you should enter the BIOS settings at boot time. Depending on your hard drive in which to make a reasonable setting. If that does not, then may be your motherboard does not support large-capacity hard drive, this time you can try to download the latest motherboard BIOS and make an update to resolve. Such failures more in high-capacity hard drives and motherboards with older when. In addition, because a sudden power failure and other reasons to make BIOS settings confusion may also lead to this failure from happening.

Fault 6: No matter what the equipment is not properly using the guidance system

Such failures are generally due to the hard disk has been virus "logic lock" lock caused by the "hard logic 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.

"Logical lock" locking principle: the computer boot DOS system will search all volumes is the order, when the DOS is directed, first of all to go find the master boot sector of the partition table information, and then search for the logic of the extended partition plate. "Logical lock" changes the normal primary boot partition record, will expand a Logical disk partition the first point to themselves, making 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 to to form a loop.


To the "logic lock" unlock the easier way is to "hot pluggable" hard power. Is when the system is started, the first is not to be locked to the hard disk power-up, and then to the hard disk to start the completion of "hot plug" on the power line, so the system can properly control the hard drive. This is a very dangerous approach, in order to reduce the level of risk, encountered a "logical lock", all of you is best in accordance with the following a few relatively simple and safe manner.

1. First, to prepare a boot disk, and then in other normal machines use the binary editing tool (recommended UltraEdit) modify IO.SYS file on the floppy disk (remember the first, before the amendment changed the properties of the document normal), specifically Search in this document which 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, then you can use software such as rehabilitation or reconstruction of Diskman partition can be.

2. Because the DM is not dependent on the motherboard BIOS to recognize the hard disk drive tool, even if the hard disk will be in the motherboard BIOS set to "NONE", DM can also identify the hard disk and partition and format and other operations, so we can use the DM software to unlock the hard disk.

First, the DM Kaodao a system disk, the connected and locked hard disk boot, press "Del" key to enter the BIOS settings, IDE interface, all set to "NONE" and save, then exit, and then use the floppy disk to start the system, namely, can "lock" to start, because this time the system does not simply mean that the hard disk. Starts to run DM, you will find that DM can identify the hard disk, select the hard disk partition format on it. This method is simple and convenient, but there is a fatal disadvantage is that the data on the hard disk retain his job.


Fault 7: boot disk can not be bootstrapped, the system does not recognize hard drive

This failure is often the most terrifying. Produce this failure is mainly due to the hard disk master boot sector data has been destroyed, the performance of the hard disk master boot partition flag marks or missing. This failure is often the culprit is a virus, it will overwrite the wrong data to the master boot sector. Some common anti-virus software on the market are available to repair the hard drive feature, we try. " onmouseout="this.style.backgroundColor='#fff'">However, if no such tools at hand disk, you can try to all the data written to the primary boot sector 0, and then re-partition and format, its methods are as follows: a clean DOS boot disk with the computer, enter A: \> After enter the following command (note in brackets):
DEBUG（进入DEBUG程序）" onmouseout="this.style.backgroundColor='#fff'">A: \> DEBUG (entering DEBUG program)
-F 100 3FF0 (clear the contents of the data area to 0)
-A 400 (add the following command)
MOV AX, 0301
MOV BX, 0100
MOV CX, 0001
MOV DX, 0080
INT 13
INT 03
-G = 400 (implementation of the disk operations command)
-Q (retired DEBUG program)

In this way can the general resurrection of your hard drive, but to re-partition and format the data inside may beware. These are the hard disk in the daily use of some of the common faults and solutions, hoping to inspire all of us. Hard drive failure is very serious, if not some of the above approach can be used, then it might be mechanical failure. Because the structure of the hard disk rather complicated, so I do not recommend that users themselves demolished, but should be recourse to professional maintenance