Data recovery

The worst thing that can happen to a computer user is the loss of his personal data. They can be restored both by special programs and specialized service centers. Learn about the techniques of saving lost information can be on many computer and not only forums.

However, not everything is so simple. Often, following the myths about data recovery, you can only hurt and aggravate the situation. It should be remembered that in the most serious cases one should still trust professionals, and not just such misconceptions and myths.

Data recovery

For external hard drives, it is best to use impact-resistant housings.

Today, marketing offers us to purchase hard drives in special rubberized casings. However, this is just a trick, they do not protect from falling. Of course, hard drives look in such a case reliably, effectively and beautifully, inspiring the buyer with confidence in the safety of data. It’s no wonder that the buyer purchases such products. But only this kind of “protection” does not particularly reduce the load on the part of the disk during the impact or fall. In case of falling from a small height, the rubberized case can really help, and even if the device is turned off. For 2.5-inch drives, the limit is half a meter, and for a 3.5-inch drive, only 20 cm. If the hard disk was still working during the fall, it probably breaks. The fact is that the maximum permissible overloads to a working such device is 5-7 times lower than on the off. Specialists specifically tested several hard drives for a fall. The height of 15 cm was fatal for everyone. Slightly better indicator, at 40 cm, showed only a device in which there were rubber dampers between the body and the disc. So impact-resistant cases do not really help in a really critical case.

If the hard disk is jarring, you must tap a metal object during the boot.

We will speak frankly, for the completeness of the effect, only a blow to the floor is missing. But can such measures really repair the disk? The result is likely to be splintered inside the shell of small particles. They will scratch the surface of the disk, and then the data recovery will be extremely difficult. Especially high-quality data can be destroyed, if after turning on the device, drop it from a height of one meter. On the surface of the pancakes will appear beautiful cuts, after which the information will be accurately lost. So the first signs of bad disk performance should serve as an excuse for emergency data backup and a trip to data recovery specialists, rather than trying to disrupt the device by hitting the case.

There is a vacuum inside the hard drive.

Some customers believe that there is either a vacuum or some kind of inert gas inside the hard drives. That is why when the hard drive is opened, dust and air will suck in it. This myth is even useful in some ways, as it discourages some who want to fix the hard drive at home by disassembling it. In fact, inside this device is ordinary air, dust-free. This sterility is needed so that nothing gets into the space between the disk and the head. At the beginning of their appearance, the disks were indeed completely hermetic, they were even thrown into the water, and after wiping the electronics board they could be used further. After all, water did not fall into such devices. On modern disks there are holes in the body of the hermetic block or on the lid. Modern devices, however, have holes in their case with warning inscriptions. There are air filters that do not allow particles that are dangerous to the surface. Such changes were introduced by manufacturers with a view to moving to new technologies and reducing the cost of production. So do not dunk modern hard drives in the water, through the filter fluid will get inside the hermetic unit.

A sterile repair room can be provided at home.

People think that you can fix your hard drive even at home.You just need to clean the room clean and you can already do the assembly and disassembly of the hard drives in it. This is one of the most popular fallacies in the recovery of information. In fact, even an experienced specialist needs a comfortable table, chair, tweezers, tripods, screwdrivers and other equipment. Provide such a workplace, say, in the bathroom will not work primarily for financial reasons. But people are trying to fix their device at home in order to save money. The disc must be disassembled and collected in a special space without dust. At the same time, a repair specialist must wear special clothes. That’s why the house will not be able to provide ideal conditions.

If the hard disk is not detected by the BIOS or the operating system, there is nothing left to do to disassemble it.

If the software does not see the device, then you can use a specialized hardware that can diagnose the hard drive. Even at this level, you can identify bad sectors, replace the firmware of the device itself, even try to write information off the damaged zones and transfer it to another medium. A disassemble disk is only necessary when it is defective physically.

Data recovery

To hard drive work better you need to cool it or heat it up.

The hard disk has a servo drive, which helps to better adjust the position of the head relative to the surface. Between the head and the disc itself, you need to maintain a certain gap. Periodically, the head begins to fail. Someone came up with the idea that if you naturally heat or cool the disk and thus cause expansion or contraction, then this can solve the problem. In fact, freezing the hard disk will cause condensation between its plates. The first activation of the device after its cooling can lead to its final damage.

There is a special device for data recovery.

Human fantasy created the myth of a wonderful device that restores information directly on damaged hard drives. It is said that magnets are installed inside it, as a result of which chaotically scattered information is built in the right way. In fact, engineers solve the problem of data recovery either with the help of software, or special devices for working with hard disks. A “clean room” can also be used if disassembly of disks is required. But the data on the physically faulty disk is never restored by anybody, for this purpose a donor device is used.

Special utilities solve the problem of data recovery.

This myth claims that no specialists in this field are needed, since everything can be settled with the help of special programs. However, in case of physical damage to the disk, not even the most advanced utilities will help. To restore in this case it is necessary on a healthy section, and even better – on a new medium.

The broken disk can be repaired.

Indeed, you can change the firmware of the device, identify and hide the bad sectors. However, this does not imply a restoration of the device. If you want to save your data, you will have to use a new disk. That’s why when referring to data recovery specialists, the donor will most often be used – such a working hard drive, to which data will be restored. If someone promises to revive the deceased disk, then the technologies described in this section will most likely be applied. However, the disk will not be repaired or new, and further work with it will involve a risk for the data. If the device starts to “pour”, then its working time is coming to an end.

From an idle disk, you can take a pancake, insert it instead of the same in the work device and read all the data.

To get such a focus, you need to guess the firmware of the hard disk and its series. Replacement should be made in completely similar devices.But even this does not negate the principles of work in a specially prepared room (remember the “clean room”) and the availability of the necessary equipment.

Professional recovery is too expensive, the price for work starts at $ 800.

There are people who benefit from this belief. In fact, the price is formed taking into account several factors. The complexity of data recovery, and hence the cost of work, directly depends on what the user did with the disk after its failure. That’s why it’s best to immediately shut down the computer and deny yourself the “pleasure” to deal with the hard drive at home. It is not necessary to use untested utilities and disassemble the device, then the master will most likely be able to do without a “clean room”. But this is the most extreme and expensive option. If the hard disk is physically physically safe, then the cost of repairing information from it fluctuates around 1500 rubles. Diagnostics are usually carried out for free, in the event of an unsuccessful attempt to save data from the client, no payment should be taken.

Data recovery

Solid-state drives can not be killed.

Indeed, drives of this type do not have moving parts, as in a hard disk. It would seem that since there is nothing to turn around, there is nothing to break. But this does not mean that such devices can be thrown and beat on them. Manufacturers tried to make such drives of smaller size and larger volume, forgetting about reliability. And the usual fall or fall into the water environment will become for the solid-state drives as fatal as for hard disks. So it’s worth treating them carefully and hope for a little bit of luck. It is worth remembering that such devices are even more expensive, but the number of recording cycles for them is limited. Over time, SSDs slow down the speed of their work.

The manufacturer guarantees 500 thousand hours of operation of the device, you can not worry about the reliability of the device.

According to such guarantees, the device should work for more than 50 years. However, statistics say that 4% of hard disks are broken already in the first year of their work. The same time as indicated on the package, indicates the estimated lifetime of the disc of this model. But nowhere is it said that he has to work so much. So these figures are relevant to marketing, and not to the real state of affairs.

It is better to pay for the recovery more, then the data will be better restored.

It should be understood that the data can not be recovered better or worse. This work will be done or will not be. It requires specialized software, special devices, tools, possibly a “clean room”. By itself, this equipment is quite expensive, but the analogs do not differ so much as to form a significant difference in the price of the service. In this case, it’s worth talking about PR and unfair advertising.

Even after full overwriting, the data can be restored due to residual magnetization.

Such a myth came to us from the past, when computers were huge, and hard drives had a small volume. The storage capacity of up to 1 megabyte was written by byte, that is, one byte was placed in one cluster. In this case, it was really possible to search for the residual magnetization and restore some data. Currently, the data is written sector-by-sector, in each of them 512 bytes are placed. The density of recording per square centimeter is gigabytes. So we can not talk about the remanent magnetization.

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