Identifying issues with data backup and restore processes due to corruption.
Identifying issues with data backup and restore processes due to corruption.
Hello, your concern is valid. Backing up data safely involves more than just copying files. Using checksums or hashes can help verify file integrity after transfer. Creating duplicates on separate drives and comparing signatures adds an extra layer of protection against corruption. Let me know if you'd like more details!
There are methods to confirm a successful transfer by comparing hashes after the data moves. For extra assurance, you could save the hash and recheck it later. If you're very cautious, storing the hash somewhere and verifying it periodically can also help detect corruption. Some storage systems, such as ZFS, offer features to safeguard against data loss.
I maintain my primary storage with backups on two external drives. The process uses FreeFileSync in standard fast date/time/size comparison mode. Approximately twice a year I run it in "compare file contents" mode to detect any changes. No issues have occurred so far. After copying everything, you can perform a file content comparison before erasing the original drive, then again against the second backup once the data is restored.
Boggles the mind why this isn’t discussed more. I have been worried about corruption of stored files for many years. I’ve lost enough files to know this is an actual issue. Just had no idea how to solve it!