Data Recovery

The golden rule after data loss: stop writing immediately.

Whether it's accidental deletion of files, formatting, partition loss or hard drive corruption, what happens after data lossThere is only one first principle: immediately stop all write operations to the device. After the file is deleted, the data is actually left on the disk, but it is marked as "overwriteable". As long as no new data is written, the deleted file is likely to be completely recovered; but once the file continues to be saved, the system is installed, or even the system is repeatedly booted, the original data may be overwritten by new data. At that time, the gods are hard to save.

90% of these "common sense mistakes" have been made.

After data loss, these seemingly reasonable actions are actually fatal:

• Repeated rebooting, repeated insertion and removal of hard drives:Each power-on may cause the dying head to further scratch the disk.
• Using the online "recovery software" blind scan:Running scanning software on a physically damaged hard drive is equivalent to letting the wounded run a marathon, which will accelerate the complete scrapping.
• Restore data to the same disk:If the recovered files are saved back to the original disk, they will directly overwrite the data to be recovered, resulting in permanent loss.
• Forcibly formatting and initializing damaged hard drives:This can corrupt file system structures and complicate an otherwise simple recovery.

III. Logical faults vs physical faults, handled in completely different ways

• Logic fault:Mistake deletion, error formatting, partition table damage, virus damage. Hard drive itself intact, usually with professional software can be high probability recovery, and recovery speed.
• Physical failure:Magnetic head damage, motor jam, disk scratch, main control burned, water fall. Must be in the clean room environment cleanroom platter recovery, replacement matching magnetic head or chip-level direct reading, equipment and technical requirements are extremely high.
• Special Scenes:RAID arrays, NAS, Databases, USB drives/SSDs have their own technical routes, and cannot be applied to ordinary hard drive methods.

4. How to choose a reliable data recovery organization

Data is priceless, and the wrong institution may "lose data and lose money". When selecting, look at four points: whether there iscleanroom platter recovery laboratory(cleanroom platter recovery hard threshold for recovery); whether or notFirst diagnosis, recovery success before charging; Promise or notStrict confidentiality of customer data; whether there isSuccess stories of similar media. Before sending for repair, you can call to describe the fault first, so that the other party can preliminarily judge the difficulty and approximate cost, to know well.

V. Prevention before it occurs: 3-2-1 backup principle

The best way to recover data is to never lose it. The industry's common "3-2-1 principle" deserves everyone's attention: retention 3copies of the data, stored in2Different media, among them1 Keep your photos, documents, and corporate databases offsite or in the cloud. Once you do that, you'll never regret an accident.

extended reading

• PC with physically damaged storage media, still needed after recovering dataPC Repairto restore use.
• When an enterprise storage array(e.g. RAID5/6) crashes, you need to have bothServer Repairand data recovery capabilities.