The situation is familiar to many: the user accidentally deleted an important file – how to restore it? In fact, this is a Data Recovery Services task that in most cases can be solved on your own – with the exception of situations where the file drive has received serious mechanical, chemical or other external damage.
In filesystems, deleting an object from the recycle bin, or using the Shift + Del combination, usually does not imply its physical removal. Only information about the file is erased, more precisely, about its location on the disk. But over time, especially if the space runs out, the likelihood of a physical “sweep” increases: new data can be written to the area of \u200b\u200bthe media that is marked as free. Therefore, the sooner the user decides to restore files, the higher the probability of success.
There are several proven solutions on the recovery software market. The recovery algorithm is approximately the same for everyone, the utilities differ in functionality, convenience, and, well, cost. There are also free programs – let’s start with them.
When data can’t be recovered :
In some cases, even in the absence of any external damage to the carrier, the data cannot be reanimated. This is primarily about modern solid-state SSDs that support the TRIM function. This is a function, or command, that the operating system sends via the ATA interface to the disk indicating that certain blocks of data are free and can be used to write new information.
TRIM ensures even distribution of Linkedin data on the SSD. The team is needed to increase their productivity and, ultimately, to extend the life of the media. This is all the more relevant since the limited number of read / write sessions is the “Achilles heel” of solid state drives.
Most modern operating systems, starting with Windows 7 and Mac OS X (from version 10.10.4), support TRIM. The command does not work on virtual disks in image format and on RAID arrays. Thus, if the SSD drive, OS and file system support the TRIM function, in most cases it will not be possible to recover deleted files on a solid state drive, even using the most advanced software.