【 Weak current College 】 doing hard disk protection at the grassroots level---Power By 【 China power house network 】

1. hard disk is reading and writing is not suddenly loses power
Hard disk read and write operations, is in speed rotation (now usually 7200 revolutions per minute or 5400 RPM), if a sudden power failure, may result in severe head and disc friction damage the hard drive. It's best not to sudden shutdown, shutdown is important to note that the hard drive led on the Panel is still blinking, only when the hard drive led stops flashing, the hard disk read-write end before shutdown.
2. pay attention to maintain sanitation
In the damp, dust, powder serious exceeding environment using computer, there will be many more pollutants to adsorbing surface of the printed circuit board and the spindle motor. Humid environment also makes the insulation resistance, and other electronic devices is not stable. Therefore you must keep the environment and health, reduce the degree of moisture in the air and dust. Remember: General computer users will not be able to open the hard drive cover, otherwise the dust in the air into the hard disk, read in the head, write to scratch disc or head. So when a hard drive failure, not to dismantle the hard drive enclosure, and should deliver a professional manufacturer for repair.
3. takes note of the hard disk shock (this is important)
Hard drive is a high-precision equipment, head of the disc surface float height only a few microns. If the hard disk is in a read-write state, in the event of larger vibration may cause head and platters of impact, resulting in damage. So don't move the running computer. In the hard disk installation, demolition process should be more careful, your hard drive when you move, transport, it is best to use strictly prohibited kepeng foam or sponge packaging protection to minimize vibration.
4. takes note of the control environment temperature
When using the hard drive against high temperature, moisture, anti-electromagnetic interference. Hard work will produce some heat, use of thermal problems. Temperature to 20 to 25 ° c is appropriate, the temperature is too high or too low may cause crystal oscillator clock clock speed changes. Temperature also cause malfunctioning hard drive circuit elements, magnetic media will also effect due to thermal expansion and caused log error; temperature too low, the moisture in the air will be condensed in IC components, causing a short circuit. Humidity is too high, the electronic components surface may be a layer of water film adsorbed, oxidation, corrosion circuits, so bad that even short circuit, also makes magnetic magnetic media changes, causing the data read and write errors. Humidity is too low, easy to accumulate large amounts of rotating machines produced by electrostatic charge, these static CMOS circuit will burn, adsorption dust and damage to the head, scratch disk slices. Room humidity for 45 ~ 65% suitable. Note to air dry or regular power on the system, its own heating will evaporate within water vapor. Also, try not to make the hard drive near strong magnetic fields, such as speaker, Horn, electric motor, radio, phone, etc., in order to avoid the hard drive of the recorded data by magnetizing and damage.
5. make use of the hard disk
Root general storage system files and subdirectories to store as little as possible. To always run Windows Disk Defragmenter to defragment the hard drive. Note frequently by deleting "dumpster" and "\WINDOWS\TEMP directory for temporary files.
6. preventing computer viruses on the hard drive destruction
The hard drive of a computer virus attacks, you should be aware of the key objectives with the most up to date anti-virus software to protect against the virus. And attention on important data protection and regular backups.
7. hard drives get method
Hard drive holding you don't bump on, this is just one of the required; another taboo is "static". Climate is dry, extremely easy to generate static, in this case if not carefully hand touching the circuit boardon the back of the hard disk, the "static" is likely to be hurt, components on your hard disk to function properly. Correct posture should be to hand grasp both sides of the hard disk, and avoid its direct contact with the back of the circuit board. In addition, some manufacturers (like Seagate) in its hard disk external package with a layer of protective films, this film with shockproof protection function, the protection to which the circuit board, so users get a hard disk can be fewer scruples.

Second, the hard drive using common fault and repair
A common fault: the system does not recognize the hard drive
System cannot boot from the hard disk, boot from A disk or enter the C disk, use the automatic monitoring of CMOS function cannot find the hard drive. Such failures are mostly appears in the connection cable or an IDE port on the hard disk itself failure is unlikely to re-plug the hard drive cable or change IDE interface and cable, replace the test, you will soon find fault. If the new connected hard disk will not be accepted, a common reason is that the hard disk's master-slave jumper, if an IDE hard drive line 2 hard disk device, it is necessary to distinguish between master-slave relationship.
Common breakdown 2: hard drive cannot read and write or do not identify
Such failures are typically caused by the CMOS setup failure. CMOS in hard disk type are correct or not directly affect the normal use of the hard disk. Now machines support "function, IDEAutoDetect" can automatically detect the type of hard drive. If the hard disk type error, sometimes simply cannot start the system, can sometimes start, but will read and write error occurred. Such as CMOS type hard drive in less than the actual capacity of the hard drive, the drive behind the sector will not be able to read and write, if this is a multiple-partition state the individual partitions will be lost. There is also an important cause of the failure, due to the current IDE support logical argument types, the hard disk can be "Normal, LBA, Large", if in normal mode to install the data, but also in the CMOS to other modes, the event of a hard disk read/write error failure because their mapping relations have changed, and will not be able to read the original correct hard disk location.
Three common fault: the system cannot start
This failure is usually based on the following four reasons:
1. the primary boot loader is damaged
2. the partition table is corrupt
3. the partition is activeBit errors
4.DOS boot file corruption
Among them, the DOS boot file damaged most simple, use a boot disk to boot the system after a boot file. The primary boot partition is corrupted and damaged the effective bit generally can use the FDISK/MBR force overwrite. Partition table corruption is more trouble, because it does not recognize the partition, the system will put the hard disk as a nonpartitioned bare disc handling, thus causing some software will not work. But there is a simple method of using Windows2000. Find a system with Windows2000, damaged hard drive hangs up, turn on after Windows2000 in order to guarantee the stability of the system hardware will be grafted in the new hard drive for scanning. Windows2000-hard drive scanner CHKDSK for for various reasons damaged hard disks are good finished restoration capability to scan and fix hard disk basically.
Partition table is corrupt, there is also a form of EOB "partition mapping", the specific performance is an active partition and partition. The same include file structure, content, capacity. If in any area on the partition content made changes will be reflected in another Office, it seems to be mapped as a shadow. I have come across before, 6.4G hard drive into 8.4G (mapping the 2 g C district). This problem is particularly embarrassing, this issue does not affect the use, repair, or something, but when you want to repair, NORTON DISKDOCTOR and PQMAGIC of all became open eyes blind, with a total capacity of the partition and hard disk does not match the actual size, with no problem in perfunctory you. To tackle this problem, only use NORTON GHOST to overwrite and rescue disk restore partition table.
Four common fault: a hard disk has bad road
This is a shocking that people see people afraid of the word. Recently, IBM reputation because of the decline. When you use system Windows system with a disk scanner to scan hard drive SCANDISK, the system prompts that hard drive may have a bad track, then Flash a terrorist's blue, yellow box slowly spread, then, in a square marked on a "B" on ...
In fact, these bad track mostly logical bad road, can be repaired. Do not carry-in (it is said that manufacturers are development-test tool for repairing hard disk can't stand half simply good this fact "cruel").
Then, when there are such problems, how should we deal with it?
Once you use the "SCANDISK" scans the hard drive if prompted with bad road, first of all we should reuse the brand hard drive their own self test to perform full scan. Note, however, don't choose a quick scan, because it can only detect approximately 90% of the problem. In order for your own peace of mind, in that spend more time is worth it.
If the check result is "successful repair", it can determine is the logical bad road, you can clap chest breath; if not, then no repair may, if your hard drive is still in warranty, then get it to replace it.
Because logical bad track only family marked, in the future, do not use assigned to the file. If this is the logic of bad road, as long as the hard disk is reformatted. But in order to prevent the phenomenon of discarded format can (because the family has made a mark that is the bad clusters, the formatter may not check is accepted the "reality", then drop it), it's best to partition, use the if such software or IBMDM fairly quickly, or GHOST cover can also be, but these two are more or less lose some data.
Five common fault:hard drive capacity and the nominal value does not match the obvious
In General, a hard disk formatted capacity is less than the nominal value, but this gap is never more than 20% if the difference is large, you should enter the BIOS settings when powered on. Where your hard drive for a reasonable setting. If not, then probably your motherboard does not support large capacity hard drive, you can try to download the latest BIOS of motherboard and refreshed. This kind of failure in the high-capacity hard drives and older motherboards and match. In addition, because suddenly loses power, makes confusion BIOS settings can also cause this failure.
Six common failure: unable to boot hard disk bootstrap, the system does not recognize the hard drive
Such failures are often the most was terrible. The failure of the main reasons is the hard disk partition boot sector data is corrupted, performance for hard disk partition or partition label is missing. This failure is often the culprit, it will override the error data to the master boot sector. Some of the common market that anti-virus software provides repair hard drives feature, you may wish to try. But if you have no such tool, you can try the full-0 data is written to the master boot sector, partition and format again, its methods are as follows: use a DOS boot disk clean boot the computer, enter A: > after entering the following command (in parentheses as a comment):
A:\ > DEBUG (go to the Debug programs)
-F1003FF0 (the data area of the content-0)
-A400 (increase following command)
MOVAX,0301
MOVBX,0100
MOVCX,0001
MOVDX,0080
INT13
INT03
-400 G = (perform disk operations command)
-Q (exit DEBUG programs)
Use this method generally makes you hard drive resurrection, but because of the need to repartition and format the data to the warrant. These are the hard drives in the daily use of some common breakdown and solution that will hopefully be inspiring for us. If a hard drivecrash quite serious and cannotWith some of the ways mentioned above, it may well be a mechanical problem. Due to the hard drive of the structure is quite complex, so does not recommend the removal of the user himself, but to turn to the professionals to repair.
Seven common fault: regardless of the device are not normal boot system
This failure is due to the hard drive is generally virus "logical lock" locked, "hard disk logical lock" is a very common means of pranks. In a logical lock, regardless of what device does not boot the system, or even a floppy disk, CD drive, hanging like double drive does not have any effect.
The "logical lock" locking principle: the computer is in boot DOS system will search all logical disk order, when a DOS is the boot-time, first to find the master boot sector of partition table information, and then locate the extended partition, logical drive. The "logical lock" modifies the normal master boot record, you will expand the partition of the first logical disk point to themselves, makes DOS on startup to find the first logical disk, locate the next logical disk always find himself, this formed a dead loop.
To the "logical lock" unlock the easy way is the "hot swap" the hard drive power. That is when the system starts, the first not to be locked in the hard disk is powered on, the startup is completed and then to the hard disk "hot plug" on the power cord, so that the system can control the hard disk. This is a very dangerous way, in order to reduce the risk, meet the "logical lock", all the best in accordance with the following sort of relatively simple and secure way.
1. first prepare a boot disk, and then in the other working machines use binary editing tools (recommended UltraEdit) modify the IO.SYS file on the floppy disk (remember to first before modification of the file attributes to normal), specifically in the file search first "55AA" string to locate later modified for any other number. Use this modified systemfloppy disk you can smoothly with locked hard drive boot. However at this time due to the hard disk partition table has normally been damaged, you cannot use "Fdisk" to delete, and modify partitions, you can use Diskman and other software you can restore or rebuild partition.
2. because the DM is not dependent on the motherboard BIOS to recognize the hard drive hard drive tools, even in the motherboard BIOS to the hard drive is set to "NONE", DM also recognizes the hard disk and partition and format, and so on, so we can also use DM software to unlock your hard disk.
First of all, to copy the DM to a system disk, connect the hard drive after the power on lock, press the "Del" key to enter BIOS Setup, all the IDE interface is set to "NONE" and save the back exit, and then start the system with the floppy disk, the system starts the "locking", because the system is simply equal to no hard drive. Run DM after startup, you will find the DM can recognize the hard drive, select the hard disk partition to format. This method is simple and convenient, but there is a fatal flaw is that the data on your hard disk could not retaining.