Data Recovery and Storage Media

Data recovery is the process of recovering data from corrupt hard drives and other storage media when it can not be accessed normally. This recovery may be required due to physical damage to the storage device or file system damage (such as a virus), it successfully connected prevented by the host operating system. Manufacturers of hard drives rarely tell their clients hard drive can easily stop working, even under normal conditions.
Physical damage to the hard drive and storage media, such as scratching off the metal substrate for CD-ROM, usually causing loss of data and often causes the logical structure of damaged file system as well, which has resulted in logical damage that must be fixed before saving a file from damaged media. Because of the physical damage can not be repaired end-user, usually expensive data recovery company has been working to save the important data, and these companies use the "Class 100" / ISO-5 cleanroom facilities to protect the media while repairs are in progress, and how to prevent dust particles from settling on the hard drive after starting, which can damage the platter and threaten the recovery process. An example of physical recovery procedures to remove the damaged tile and replace it with a healthy, or replacement parts hard drive broke with parts functioning hard drive. Creating a virtual disk, which is commonly known as "disk imaging" is also useful in restoring lost images, and the images can be converted into a usable form. Logical damage can also be removed by this method.
Logical damage hard drives and storage media, which is usually caused by a power interruption, virus or system crash, it can take a hard drive without useless, and can be prevented by using reliable file system such as ext3 and regular trips degfragmenting. There are two main methods of recovering data from a hard drive that is logically damaged. One scanning logical data on the disk and make sure it is in accordance with its specifications (known as parity checks), which checks the directory and file entries and indicate whether they are in the right place. Otherwise, the message is printed and solve problems both 'chkdsk' and 'fsck work in this way. Additionally logical recovery is called data carving, which retrieves data without file system, which can analyze data, provide details of logical errors, and help in the reconstruction process of the file system.
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