Fiyors

Hi Team, This month, Unraid performed a Scheduled Parity Check, and it detected errors: "Scheduled Non-Correcting Parity-Check 2025-03-07, 11:23:48 (Friday) 16 TB 2 days, 22 hr, 51 min, 17 sec 62.7 MB/s OK 34552 5 days, 14 hr, 48 min, 37 sec 12" I didn’t pay much attention to it because I still had access to my data, and everything was working fine. I assumed the issue had been fixed since the "Write corrections to parity" option was enabled, meaning it should have written over the bad sectors. I noticed nothing unusual—everything worked as expected. Then, I decided to update to version 7.0.1, and after rebooting, Unraid no longer recognized Disk 8, marking it as "Invalid Disk." At that moment, I realized that I had lost all the data on that disk—5TB gone. I panicked. Neither Unraid’s support, nor the forum, nor I could find a solution. This whole situation made me question something critical: 👉 Is Unraid really stable, and can it guarantee data safety? After checking the array and logs, the SMART data for Disk 8 (a brand-new drive) showed no issues. According to Unraid, there was data corruption, and that corruption was written to the parity disk, causing the data loss. I then attempted a Rebuild Data, which took four days to complete. By that point, I had already come to terms with the fact that I would lose some data. And sure enough, after the rebuild was finished, the data was gone. LOGS - https://drive.google.com/file/d/1AI2LIp7n1J0UPY-gENrh34IcJPVaOGMe/view?usp=sharing After completing the data rebuild, I saw a message prompting me to format the disk. I went ahead and formatted it, and now it appears in the array. I'm currently running a SMART test to check for any errors. I've lost my data, and I feel extremely frustrated.