Hard Disk Drive Crash
Take the computer systems. We are so used to working on the computer regularly so that we are rarely prepared to face the consequences if things go wrong. This is even truer of a computer hard drive crash than anything else. Hard drive failure can be divided into two types: one is called firmware level error is generated, which can be improved related software factory orders; the other is on the left of the physical hard disk physical level failures caused by damage to the parts. As to the latter Physical Level crash, the typical case in data recovery practices that direct contact of the head caused by a crash and serious platter scratches on the head and the platter surface; Such drives are manifested undetected, staying busy, besides an ominous scratching sound emanating from the disc starts. This is a serious problem. This suggests that not less than one accident on the hard drive.
functioning hard disk
To understand the problem with the hard drive crashes, it is important to first understand the mechanism of the hard disk. Only after knowing that the disc drive functions to understand the nature of the problem.
pickup: The read-write heads for hard disk drives are those mechanisms that, as the name suggests read or write data to the magnetic fields of the platters.
Hard Disk Platter: A hard disk platter is a circular disk of the hard drive. This circular shape, and the magnetic medium on the disk drive stored. Overall, more platters spindle is equipped with a hard disk drive.
lubricant layer: This is the top layer of the platters and made of a material similar to Teflon.
Carbon: There is a layer of sputtered carbon over the lubricant layer.
magnetic layer: below this layer of carbon.
The magnetic layer of the hard drive to store all the data. The two layers of carbon and lubricant like material did this to be the magnetic layer of accidental contact of the read-write head of the disk, it can be said that there exist, as the protective layer of the magnetic layer (of course, another important function of them to maintain the stability of the flying read-write head)
the rotors move in an exceptional speed, and read data from or written to the magnetic layers of the read-write head over which flies the surface of the bowl. Since the read-write head flies over the platter surface height is controlled by a thin film or layer of air trapped in the platters and the slider surface of the read-write head. It & # 39; therefore it mentioned that one of the functions of the protective layer to maintain the stability of the flying read-write head: a film floating in the air above the heads of the interface will be created when the surface of the platter maintains flat and smooth.
If the read-write head comes into direct contact with the surface of the disk, then the head can scratch through the protective layers of sputtered carbon and the lubricant material, leaving a circle scratch area to the platter. This is called a head crash or a hard disk drive platter crash.
due to hard disk crash
The cause of a head crash can be a minute particle causing a bowl of read-write head to bounce against the plates. The head is made of hard materials can scratch through the protective layer. If the head bounces against the bowl while the latter is rotating at a speed equivalent to a thousand revolutions per minute, and then is connected to the head scratch the bowl surface. This destroys the magnetic layer of the platters. When the head begins to drag the bowl, and then the data loss can be enormous. In addition to the head at the end of overheating or physical damage to the hard drive to work correctly. Because even the possibility of further head crashes increases particulate released in a head crash Scrape the bowl surface, leaving more scratches to the platter each time you power up the drive.
Data backup drives physical scratches
The data backup is physically damaged (head crash / platter scratch) hard drives are currently the best and the only solution is to open the HAD in a proper environment (eg, clean room ) to replace the damaged physical head stack, meanwhile to clean up the particles on the platter, then worked for postoperative data backup drive. However, this method will not work in every case, especially if you have a severe scratch area on the platter, head crash caused by which – besides a failed head swap, the scratch area can be an obstacle to successful data recovery: even after the replacement of the crashed head stack faultlessly then it collapses immediately when turned on, so the scratch issue worse and there is no possibility for users to read all the data (data up to find the right area of the platter) out of the drive. The reason for this situation is that when the head flies over the scratch area (it does not matter if you try to read from this area or not) since the break in the protective layer of the head is unable to maintain a floating state when the scratch area but it makes a connection directly to the bowl again in the head at the end of overheating or physical damage (crash or short circuit). The point is how to recover the data from the patient drive becomes the point, how can you make the head passes the scratch area smoothly.
Platter Scratch Restoration Solution
What is Platter Scratch Restoration Solution?
The Platter Scratch Restoration Solution joint effort formed the basis of the unique technology SalvationDATA, Computer Institute of CAS, Chemistry CAS Institute of Physics, CAS, which will take over in two years, and interdisciplinary achievements of hundreds of thousands of dollars in R & D and integration in several areas such as chemistry, physics, and computer applications. It is the perfect solution for the current corner of data backup drives heavy bowl of zero to enable data recovery specialists who are working on physical data recovery a deeper and more comprehensive capabilities.
Basic principles of operation:
SalvationDATA Platter Scratch Restoration System includes the following major components:
1. High precision scratch positioner
2. High pressure cleaner
3. Nanometer filling materials spray arm
master program controller 4.
the system first clean up the target platter from the high pressure air cleaner; then scan the bowl with the optical scratch positioner contact size and depth of the scratch area and label; finally the spray arm contains the nanometer filling materials fill the scratch area under the control of the donor material master program controller, to restore the scratches and the scratch area revert smooth and thus allows the head to pass the scratch area in a stable floating status that data recovery is a good area can be achieved. The scratch positioner carries out analysis and positioning towards the tiny scratches imageology optical technology; sending the scan report back to the master control program, repair manual movement is created and sent to the spray arms control implementation. It controls the nanometer filling materials and high precision nozzle of the master program controller ensures 100% accuracy of the restoration; During the filling materials improved by trial and error, it does not cause any chemical reaction with materials in the different layers.
As for the multi-plate drive, the system will record the platter alignment by using optical image before separating the target platter dish assembly; so that the platter alignment can be easily restored after the restoration from scratch. The entire restoration process carried out by the master program controller and the full angle robot arms are not under the control of the user & # 39; s intervention would have to be the fastest and safest solution for platter scratch restoration available; What & # 39; s more, the estimated price would be around $ 5,000, the system only, so most adoptable and popular equipment.
The system includes robot arms and workstations designed for standard platters of 3.5-inch, 2.5-inch and 1.8-inch hard drives from various manufacturers; It is fully compatible with the bowl toward those types of hard disk recovery needs. (All this plate contains a unique manufacturing process and technology, such as the glass platter technology worked, and hopefully will be released the day of departure plus six months).
One final note
what this system is to carry out a padding restoration to the platter scratch alternatives; Therefore, the contact information is lost beyond recovery after the scratch area on the platter restoration. This is the importance of ensuring that the solution is read-write head across the scratch area smoothly, so that the head will continue to work with the data after reading good area.