Repair the hardware of a hard disk

The hardware of a hard disk can be damage by a lot of reasons and, depending of the fault. The types of faults that we can have are the followings:

- Headcrash: A little fault of fabrication, a fall or a bad movement transporting the disk can do that the heads of read and write, which are like wings of a plane flying some nanometers over the disk, land over the disk and unpin its ferromagnetic layer where the data are stored. This kind of fault is very frequent, and the user will notice that the disk goes slow when try to read a determinate data. If a tool to detect bad sectors are used, will appear a lot of them and with the use, will appear more and more.

- Other breakdowns of the heads: if the dust enters in the housing of the hard disk, which must be closed hermetically, added to read errors, can cause that the heads don't move as they must. Too can be unpinned by hits.

- Overheating of the engine: a high temperature can damage the bearings of the engine making destabilize the heads.

- Burn circuits by surge: is so common, when are not available a power strip or a UPS that protects of surges that the circuits of the hard disk ends burned a stormy day. To solve it we have to carry it to a specialist, to repair it in airlock room to change the circuit taking it from other hard disk equal.

- Thermal imbalance: the expansions that suffers the components of the device when heated suddenly to start in a cold environment, can do that all fails. Some say that freezing the disk the problem can be solved during a time to copy the data, although I wouldn't do it.

So you know, if you want have your data safe write them in a stone.