Can data be recovered from a NAS after multiple drive failures?

Summary:

Yes. Recovery is often possible even when multiple drives in a NAS have failed, depending on the RAID level (RAID 5, RAID 6, RAID 10, Synology Hybrid RAID, etc.) and the extent of physical damage. Professional recovery involves rebuilding the RAID virtually, repairing metadata, and extracting data without altering the original disks.