Hard drive failure
Take the case of computer systems. We are so used to working regularly on a computer that we are rarely willing to face the consequences if everything goes wrong. This is more likely to crash the computer on the hard drive than anything else. A hard drive failure can be divided into two types: one is the so-called firmware level failure, which can be repaired using the appropriate software or factory commands; the other on the left is a physical layer malfunction caused by damage to the components of the physical hard disk. Regarding the last physical level crash, a typical case in data recovery practice is that a head crash and serious scratches on a plate are caused by direct contact between the surface of the head and the surface of the plate; such discs manifest themselves as unnoticed, remaining BUSY, as well as sinister scratches can begin from the disc. This is a serious problem. This indicates nothing more than a hard drive crash.
Hard drive function
To understand the problem of hard disk failure, it is important to first understand the mechanism of the hard disk. Only by learning how the functions of the drive can understand the essence of the problem.
Components
Read-write head Heads for reading and writing hard drives are those mechanisms that, because the name involves reading or writing data from the magnetic fields of the plates.
Hard Disk Platter: A hard disk drive is a circular disk in a hard disk. It has a circular shape and stores magnetic disk media. Usually, several plates are mounted on a single spindle hard disk.
Lubricating layer: this is the topmost layer of the plates and is made of a substance like Teflon.
Carbon: there is a layer of atomized carbon just below the lubricant layer.
Magnetic layer: it is below the carbon layer.
Functioning
Magnetic hard disk layer stores all data. Two layers of carbon and a material similar to a lubricant prevent accidental contact of the magnetoresistance with the read and write head of the disk, it can be said that they exist as a protective layer of the magnetic layer (of course, another important function is to maintain the stability of the flying read and write head)
The platter moves at exceptional speed, and the data is read or written to the magnetic layer using a read / write head that flies over the surface of the plate. As the head of reading and writing flies over the surface of the plate, its height is controlled by a thin film or layer of air sandwiched between the plates and the surface of the slide of the read / write head. Therefore, we mentioned that one of the functions of the protective layer is to maintain the stability of the flying read and write head: a film of air floating its head over the surface will be generated only when the surface of the plate maintains a flat and smooth surface.
If the read and write head is in direct contact with the surface of the disc plates, then the head may scratch through the protective layers of sprayed carbon and lubricant, leaving an area of scratches on the disc. This is called a hard disk failure or malfunction.
Cause of hard drive failure
The cause of a head crash can be the smallest particle that makes the read / write head bounce off the disk. The head is made of hard materials that can scratch through all protective layers. If the head is built against the plate, while the latter rotates at a speed equivalent to thousands of revolutions per minute, the head should scratch the surface of the plate. This destroys the magnetic layer of the plates. If the head starts dragging the dish, then the data loss can be huge. In addition, the head will end up with overheating or physical damage, so that the hard drive will stop functioning normally. Even the possibility of further malfunctioning of the head increases as the particles released from one breakdown of the head are scraped onto the surface of the plate, leaving more scratches on the dish every time you turn on the drive.
Recover data from physical scratch discs
To recover data from a hard disk with damaged physical damage (malfunction / failure), currently the best and only solution is to open HAD in the proper environment (replace the damaged physical head stack, while cleaning the particles on the tablet, then running for recovering data from a postoperative disk, but this method will not work for all cases, especially when there is a serious scratch area on the plate that is caused by a head crash — around a head changer, scratches will also be an obstacle to successful data recovery: even after you correctly replace a broken head stack, it will immediately turn off when you turn on the power, which will deteriorate the quality of the scratch, and users will not be able to read any data (even the location of the disk area is at a good level.) The reason for this situation is that when the head flies over the scratch area (no matter if it tries to read this area or not) due to a breakdown of the protective layers, the head cannot T he longer support the floating status when it comes to the area of the scratch, but again in contact with the plate, the head end overheating or physical damage (crash or short circuit). The data recovery point from the patient's disk becomes a point to make sure that the head passes the scratch area smoothly.
The solution for the restoration of scratches on the plate
What is the solution to restore scratches on a plate?
Plat Scratch Restoration Solution is a unique technology developed jointly with SalvationDATA, CAS Computer Institute, CAS Chemical Institute and CAS Physical Institute, which takes more than two years and hundreds of thousands of dollars for research and development, integrating the interdisciplinary achievements of many areas, such as chemistry, computer application and physics. This is the ideal solution for the current angle of data recovery from disks with various scratches on the plate; providing data recovery professionals who have worked on recovering physical data are a defect and more complete capabilities.
Basic principles of work:
The SalvationDATA Platter scratch regeneration system includes the following main parts:
1. Positioning positioner with high accuracy
2. High pressure cleaner
3. Nanoscale nozzle for spraying
4. Master software controller
The system will first clean the target dish using a high pressure air filter; then scan the tablet using the optical scraper positioner to find the scratch area and mark its size and depth; Finally, the spray sleeve contains nanometric fill materials that fill the scratch area with donor materials under the control of the main software controller to restore the scratches and make the scratch area returned to flat and smooth, so that the head passes the scratch area in a stable floating state recover data from a good area. The scratch positioner analyzes and positions against tiny scratches using optical imaging technology; By sending a verification report back to the main software controller, a stream of repair instructions will be generated and sent to the spray controller for implementation. Nanoscale filling materials and high-precision nozzle, controlled by the main software controller, provide 100% accuracy of recovery; while filling materials have been improved by trial and error, it will not cause any chemical reaction with materials from different layers.
For multiple plate drives, the system will record the alignment of the plate using an optical image before separating the target dish from the plate assembly; so that the alignment of the plate can be easily restored after the restoration of the scratch. The entire recovery process will be transported by the master software controller, and hands at the full angle of the robot control, without user intervention, should be the fastest and safest solution for repairing scratches on the plate; that, most likely, the estimated price of the system will be only about $ 5,000, which will make it the most acceptable and popular equipment.
Support list
The system includes robots and workstations designed for standard plates of 3.5-inch, 2.5-inch and 1.8-inch hard drives from different manufacturers; Fully meets the requirements of the restoration of the plates to the above types of hard drives. (As for those plates that contain special technological processes and technologies, such as glass plate technology, and hopefully this will be announced on the first launch day plus 6 months).
Closing note
What we do with this system is to restore the scratch strip using alternative materials; therefore, the data found on the scratch area will be lost after recovery even after the disk is restored. The value of this solution is to ensure that the read and write head passes through the scratch area smoothly, so that the head continues to work to read data from a subsequent good area.
