Horrible! Abnormal power failure caused so much damage to SSD military storage!

The emergence and development of SSD solid state drives have brought users an unprecedented revolution in read and write speeds compared to traditional HDD mechanical hard drives. For military storage, however, SSDs have always faced greater risks, and abnormal power failures are fatal. Part of it.

If the computer does not shut down normally due to unexpected power failures, blue screen crashes, etc., it can be called abnormal power failure. SSD is an integrated circuit storage and needs to be continuously powered on during the reading and writing process.

Therefore, once an abnormal power failure occurs, it will not only cause The unsaved data in the SSD is lost, and in extreme cases, the previously written data will be wrong, making the SSD unable to be recognized by the system.

In layman's terms, the SSD will completely become a "brick", and it is almost impossible to save the data, unlike a mechanical disk that can be restored by any means.

So, why does an abnormal power failure cause so much damage to the SSD?

This is mainly because the SSD sets an FTL table (Link Table) in the internal DRAM cache, which is responsible for recording the metadata necessary for the normal operation of the SSD. Although it has nothing to do with user data, it plays an important role in the normal operation of the SSD. Missing role.

After an abnormal power failure, the metadata in the FTL table is easily lost or damaged, and the SSD will naturally not be able to read and write normally.

If the abnormal power failure causes the SSD to be damaged or bricked, the most effective emergency method is to try to repair the damaged FTL meter after the power is restored, but this process takes a certain time, so there is a "power-on for 30 minutes idle" The method is to do not rush to do any operation on the SSD after the power is restored, first let it stand still for about half an hour.

However, this kind of emergency rescue method is not necessarily successful, so on the one hand, we should pay attention to prevent accidental power failure as much as possible during the use of SSD. On the other hand, we can also consider buying SSD equipped with tantalum capacitor power failure protection, but only part of it. High-end SSD and enterprise SSD.