Jumat, 18 Februari 2011
Types Of Data Loss
Perhaps the most common cause of data loss is through the accidental deletion of files. This is
correspondingly the easiest problem to fix. Most deleted files are not actually removed from the
hard drive. The space they occupy is simply marked as being able to be written to by new data.
Given the size of modern hard drives, it can be a considerable length of time before new data is
written to that space. This is how recovery software works. They are able to track down what
data is stored in sectors labeled as blank and recover the desired information.
There are numerous types of mechanical failures that can cause physical damage to storage
media. Old style floppy disks and CD-ROMs are susceptible to damage – floppy disks through
magnetic fields and CD-ROM’s by having their metallic substrate scratched off. Hard drives are
complicated pieces of machinery with moving parts that operate at speeds like 7200 rpm.
Physical damage always causes at least some data loss. Often the logical structures of the file
system can be damaged. Before any data can be recovered, the logical structure must be
rebuilt. Unfortunately, most of us are incapable of repairing any physical damage to our hard
drives, and thus must consult with a data recovery service
Data recovery is not limited to hard drives. With the proliferation of digital recording equipment,
from cameras to PDA’s to MP3 players, the use of data recovery techniques on such things as
Flash cards is growing. Also, many organizations find that they have important information
stored on older technologies like tape drives or zip disks. These forms of media may have been
damaged over the years, and most companies probably do not have the skills or equipment to
recover data from them. There are data recovery services out there that specialize in this type
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