Computer Restart after the sudden detection of the hard drive causes analysis and solutions _ Application Skills

Wow is so exciting that I'm stuck in the net game. However, in nearly two overnight after, I do not know is the power supply or the home of the mains problem, the machine without warning shutdown. Even worse, after the restoration of power, computer restart, the hard drive unexpectedly "disappeared." What the hell is going on here? My 120GB Seagate hard drive only bought six months, it should not be so "dead"? Days! ......

No matter how much, check it first! Restart again, in the self-test screen, press the DEL key into the bios of the "Standard CMOS Features" (see figure) to detect the current system connected to the hard drive, but no matter how I set up, still can't find the hard drive.

BIOS diagram

Nasty under, immediately to the veteran call for help. Veteran said that in some cases (such as sudden blackout) will cause the BIOS hardware device information loss, through the motherboard of the Clearcmos jumper (jumper specific location and jumper method due to the motherboard, but detailed on the motherboard specification) to reset the BIOS information to solve the problem. Unfortunately, this method has failed to be declared after many tests. Under the helpless, only the most complicated replacement method was used to check. So disconnect the power, remove the hard drive, and get a friend's home check to make sure the problem is on the hard drive. A boot, not only the correct identification of my hard drive, but also into a long useless Windows 98 system (Editor Note: The author is using the Windows 98+XP dual system, because after the replacement of the host Windows XP is likely to be due to the motherboard chipset is different from the system Blue screen crash problem , so it's a lot safer to get into Windows 98 this time, which means my hard drive is OK. So what exactly is the problem? The computer can boot normally, and in the self-test, only the hard drive can not be detected, this is how to do?

Take home, then installed on the hard disk, the boot again into the BIOS, unexpectedly everything back to normal, hard disk was again detected. Oh, God! Why is that? Immediately on the Internet, in the major IT site forum post solution. Finally, the advice of netizens learned that at present, many motherboards are equipped with the motherboard protection circuit, especially the use of intel 865, 875 series of motherboards will generally adopt this protection design. The characteristic of the circuit is that when the computer encounters a sudden power failure, such as the motherboard circuit has a high current situation, the motherboard, hard disk, memory and other accessories to protect. In the protection state, even if the host power recovery restart, its optical drive, hard drive and other accessories will be in the protection of the locked state, so that the hard disk, optical drive and other storage data accessories can not correctly identify the problem. And to remove the lock of the protection circuit, only need to completely disconnect the power (unplug power cord after the shutdown, more insurance is another click on the Boot button) in a few seconds, and then connect the power on the boot can be.