In
last article, we point out some important tips which can help increase
the possibility of data recovery, such as no secondary damage, no
rebuilding partition, no disk check, etc. Simply put, you’d better stop
any action after aware of data loss.
In
this article, we’ll focus on related factors that can affect success
rate of data recovery. Only can we have a thorough understanding of
influence factors, we can become qualified guardians of our treasured
data.
Factors influencing success ratio of data recovery are listed as follows.
- Size of files and frequency of edit. After deleting or formatting FAT / FAT32 partition, it’s difficult to recover those files with large size or modified / edited frequently, like XLS, CDR files. However, success rate of recovering files that no actions are taken on after coping to disk is relatively high, such as PDF, GIF, BMP, etc. This is because file allocation table – which is used for recording cluster chain fragmentation information of every file in FAT / FAT32 partition -- is cleared after deletion or format. Due to dynamic length growth of files modified frequently, it will not be stored in file system in a row, thus file fragment information can’t be recovered resulting in incompleteness of data recovery.
- File length. Recovering NTFS partition is relatively easy. Most of the data can be recovered after deleted or formatted. Some files can’t be restored due to unrecognized file length after files deleted. This case may happen to those files with large file length or edited in a long time. And then much fragment information formed. That’s why file length can’t be recognized after files deleted. For example, data recovery software is unable to salvage database file used for many years, because the file length scanned by the software is 0. Regular disk defragment can help reduce probability of happenings, but risks still exist.
- Location. Generally speaking, later partitions can be completely recovered after repartition, partition deleted or partition table damaged. The more rearward partition is, the less possibility of getting destroyed. Therefore, you’d better save vital data in rearward location, not in C / D disk.
- File name. In NTFS system, file names of those files removed from recycle bin will be automatically changed to other names, like de001.doc. That is to say, original file names have been damaged. Therefore, don’t miss the files renamed by system when your data is lost and can’t be found out directly by file name. While file name won’t be damaged by shift + delete.
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