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bad sector

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bad sector
A segment of disk storage that cannot be read or written because of a physical problem in the disk. Bad sectors on hard disks are marked by the operating system and bypassed. If data are recorded in a sector that becomes bad, file recovery software, and sometimes special hardware, must be used to restore it.
bad sector [‚bad ′sek·tər]
(computer science)
An area of disk storage that does not record data reliably and therefore is not used.


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Cause This error could prominently occur due to one of the following reasons: Partition is infected from bad sectors or disk errors Partition table is partially or completely corrupted.
Data misplaced in bad sectors of storage media and MFT/MBR tables also recovers back via latest version of NTFS data rescue utility.
Following figure illustrates how the shadow section is created in the process of disk array recovery in the RAID 5 composed of 4 hard disks: Generally speaking, in the process of disk array recovery all sectors of the remnant hard disks will be read from top to bottom, that is to say all bad sectors in these hard disks will be found and accordingly create corresponding "shadow sections".
 
 
 
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