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2. Hard disk drive failure - Wikipedia

   en.wikipedia.org/wiki/Hard_disk_drive_failure

   A hard disk failure may occur in the course of normal operation, or due to an external factor such as exposure to fire or water or high magnetic fields, or suffering a sharp impact or environmental contamination, which can lead to a head crash. The stored information on a hard drive may also be rendered inaccessible as a result of data ...

3. Data corruption - Wikipedia

   en.wikipedia.org/wiki/Data_corruption

   Many errors are detected and corrected by the hard disk drives using the ECC codes [17] which are stored on disk for each sector. If the disk drive detects multiple read errors on a sector it may make a copy of the failing sector on another part of the disk, by remapping the failed sector of the disk to a spare sector without the involvement of ...

4. TestDisk - Wikipedia

   en.wikipedia.org/wiki/TestDisk

   Website. www.cgsecurity.org /wiki /TestDisk. TestDisk is a free and open-source data recovery utility that helps users recover lost partitions or repair corrupted filesystems. [1] TestDisk can collect detailed information about a corrupted drive, which can then be sent to a technician for further analysis.

5. PhotoRec - Wikipedia

   en.wikipedia.org/wiki/PhotoRec

   PhotoRec is a free and open-source utility software for data recovery with text-based user interface using data carving techniques, designed to recover lost files from various digital camera memory, hard disk and CD-ROM. It can recover the files with more than 480 file extensions (about 300 file families). [1] It is also possible to add custom ...

6. Windows File Recovery - Wikipedia

   en.wikipedia.org/wiki/Windows_File_Recovery

   Windows File Recovery can recover files from a local hard disk drive (HDD), USB flash drive, or memory card such as an SD card. [4][5] It can work to some extent with solid-state drives (SSD). [6] The program is run using the winfr command. [4] It has a mode designed for NTFS file systems, that will attempt recovery of files from a disk that is ...

7. Data recovery - Wikipedia

   en.wikipedia.org/wiki/Data_recovery

   In computing, data recovery is a process of retrieving deleted, inaccessible, lost, corrupted, damaged, or formatted data from secondary storage, removable media or files, when the data stored in them cannot be accessed in a usual way. [1] The data is most often salvaged from storage media such as internal or external hard disk drives (HDDs ...