How do I fix a bad hard drive?

Warm tip: It is important to note that the hard disk is a sophisticated device, very fragile, before maintenance should first wash hands, release the residual static electricity before operation.

Hard Drive failure Scan

　　One: Unable to find the hard drive situation

For hard drives that appear with an "HDD not detected" error, first check that the interface of the external data signal line of the hard disk is distorted, and that the interface solder joint is virtual. After removing the above possibility, remove the hard rear cover and reveal the circuit control Panel. Unscrew the fixing screws on the control Panel and separate the control panel from the hard drive body. You can see two rows of spring pieces on the main drive. One row as the main motor power supply, another row as the main body of the hard disk head manipulator Drive coil power supply and the hard drive body and circuit control Board between the data transfer interface. For a hard drive without special packages, it is often possible to see the spring piece and control circuit board corresponding parts have dust. With absorbent cotton dipped in anhydrous alcohol cleaning, the deformation of the spring plate shape, and remove the oxide layer, under normal conditions can be restored.

If the above processing is invalid, you must open the hard drive body. Choose a dust-less environment, unscrew the front cover of the hard drive screws (some with glue-bonded). When you remove the front cover of the hard drive, you can see the disk surface clearly. First, the digital multimeter is used to detect whether the drive coil of the head manipulator is open. The normal resistance of the coil is about 20ω. Second, detect if the wire on the head is disconnected. Each disk has a head on either side, each of which has two connections to the integrated chip on the head picker. The common model of the chip is h1710q, the role is to convert the magnetic signal into electrical signals, and then sent to the circuit Control Board processing. The head resistance should be between 23ω~26ω. If the head resistance is large, the head is damaged. Head connection and Chip h1710q connected, h1710q corresponding foot resistance should be in 1.7kω or so, if the 1.2kω below the chip has been penetrated, can be replaced with the line.

If the wire on the head of the circuit breaker, can be replaced with 0.2mm diameter of high-quality enameled wire. One end is pressed on the metal shrapnel of the head, and the other end is welded to the corresponding foot of the h1710q. Note that the enameled wire card in the corresponding slot in the picker, with a little 502 glue fixed to prevent the hard drive when the rotation and the enameled wire friction. After the hard parts of the recovery, finally with 702 silica gel will be sealed around the hard drive to prevent dust from entering. Because of the small size of the magnetic head, it is not easy to put the enameled wire card on it, preferably under the magnifying glass operation. At this time must not force too hard, otherwise it will cause head damage, so be careful and careful. After this repair boot, the hard drive can return to normal.

　Second: prompted the hard drive error situation

For a hard drive that prompts for the "HDD Controller Error" error, most of the files on the hard disk master boot record (MBR) are damaged for some reason. The MBR is located on a 0 head/0 cylinder/1 sector and is generated by the Fdisk.exe partition of the hard disk. If the MBR is damaged, the computer will prompt HDD Controller Error, is actually 0 track file damage, then format is not solve the problem, must use special software to deal with. First use the system disk after the start of a disk, run ScanDisk command to check C disk.

If 0 tracks are not damaged, just use Norton8.0 to fix the files on the track. The specific approach is: to find a built-in hard disk and to repair the model specifications are exactly the same and equipped with Norton8.0 version of the software computer, will be repaired hard drive and hard drive power cord connection, but the hard drive signal line does not connect, jumper unchanged. ① after the boot run Disk Edit command, from the menu tools midpoint configuration, will read only to cancel; ② Select driver from Drop-down menu O-biect to set hard disk type to physical disk. Click OK to determine, ③ from the Ob-ject menu to select the Partition table item, will be connected to the sound of the hard drive signal line unplugged, received on the hard drive, click OK to determine, ④ select hard Disk1 Click OK item OK, and then from write Ob-ject to The Physical Sectors dialog box sets the cylinder, Side, and sector to 0, 0, and 1 click OK. Select Yes when the warning dialog box appears. Exits the Norton software, which restores the master boot information for the hard drive. After reboot, the hard disk is restored to normal and the files on the original hard drive are not lost.

If the 0-track damaged hard disk, the first still follow the steps described above with Norton8.0 software processing, only to the third step, the cylinder, Side, sector set to 1, 0, 1 Click OK item to determine. Select Yes when the warning dialog box appears. Exit the Norton software, restart the computer, in the BIOS setup hard drive automatically detect a column can be seen, cyls value reduced by 1. If the original cyls is 2112, it becomes 2111. The original hard disk partition table is starting from the 0 cylinder of C disk, now starting from the 1 cylinder. Exit after saving BIOS settings. The hard drive is back to normal after being partitioned and formatted. There are some hard drives, self-test when prompted "HDD Controller error." Using the above method is invalid, only scrap.

Finally hint: many times seemingly complex hard disk failure, sometimes repair is not difficult, a lot of professional data repair centers are using professional software testing and maintenance, due to hard disk precision instruments, internal accessories is very complex, if the internal disk surface failure, it is difficult to repair, but some hard disk use soon caused by the fault, is likely to be a small fault, encountered problems may be dead horse when the live horse medicine, perhaps still can repair it.