Overview of Cases Where Mac Data Recovery is Not Possible in Details
Data storage and retrieval problems are on the rise and technology itself have no answer to this. While the most common data loss scenarios (such as hard disk drive crashes, viruses or malware, hardware issues) can be easily deal with using sophisticated methods for recovery, there are a few cases that render your data completely unrecoverable.
Typically, these are the situations wherein you accidentally overwrite the data after deleting files on your hard drive. If only some portion of the file gets overwritten, other parts can be reconstructed on a sector level to retrieve information. If overwriting is done multiple times, recovery would be practically impossible.
The data is stored physically on the sectors of your magnetic hard drive. The file system maintains a table that contains information about each file stored on the drive. This report tells how and where the files get stored. When you delete a file on the drive, the entry corresponding to that data in the table gets deleted, and space previously occupied by the file is marked ‘unused’.
The operating system usually overwrites this ‘unused’ space to store new data. The process of overwriting tends to re-magnetize the magnetic domains on your drive, which destroys all the previously stored information irreversibly.
The Case of Hard Drive Formatting
A user formats his drive to set up an empty file system. This process is called high-level formatting or quick formatting. It does not erase physically stored information on your drive. Hence, the data that was initially stored remains undisturbed and can be subsequently recovered by any hard drive data recovery software. Formatting only causes the file system to be built from scratch, resetting the table that contained information about each file stored on the drive.
After facing data loss, some people tend to attempt recovery themselves. In a frenzy to get back all the lost assets, they end up following certain unsafe practices that may cause permanent loss of data. Mentioned below are a few things you should or shouldn’t do in the event of data loss to increase your chances of a successful recovery:
- Try to identify the underlying error that caused data loss. After knowing the problem, prepare a plan for data recovery and for eliminating the problem at its root.
- Check your hardware (especially cables), drivers, and other software installed on the system.
- Try to analyzes the Windows Application event log for errors.
- Check if your media is access-protected.
- If you perform backups on a routine basis, try to restore all corrupt or inaccessible data from the latest clean backup.
- If you are facing intermittent drive-related problems, you should stop using the suspect media for writing new data. It will help you prevent unnecessary overwriting of information.
- You should not try to make changes to the partitions on the hard drive.
- You should not format the drive.
- Avoid using repair utilities (like Chkdsk) to correct file system errors, as it can lead to further damage or corruption.
- Do not repeatedly power up the disk drive, as it can cause instant crash or failure.