Does anyone have experience sending QNAP NAS for repair? What is the procedure if you may share (where to send)?

My TS-453mini experienced problem after a firmware update. The story: RAID10 (4 x 4TB WD RED) went into rebuilt mode after the firmware update restart (Disk 1 failure?) It stopped after sometime before finishing as the NAS reported some disk was dropped and disconnected from the array. Tried to restart the NAS and when booted up all disk is available but RAID went into "inactive". The recover/rebuilt function is no longer available.

Contacted QNAP and all they suggest is hardware failure, ask to send for repair. Dang...

Another thing: Do you guys do disk scan/SMART test for your disk in the NAS regularly? Is it necessary or good to do? Thanks.

I'll search some more but I have also tried some linux commands to fix/recreate the RAID but it seems the root device is always not found. sigh...Thought paid good money for a NAS and RAID10 config would kind of lessen issues with backup

out? or you mean use? Most NAS HDD cartridge have mounting point to screw either 3.5" and 2.5" HDD I think. You can check on the specs. but there is no point doing so as 2.5" is much more expensive. I kind of remembered there are some QNAP NAS built specifically to house 2.5" HDD or SSD and is more compact in size...

It seems my NAS hardware is OK by doing the no HDD startup diagnostic. After all those back and forth emails, QNAP did a remote login to recover the failed RAID but didn't share the way to do it. In the end, my 4TB WD RED now = 1 x completely failed, 1 x bad sector, 2 x SMART warning. Gonna backup everything and send for warranty before the 3year ends in Nov. Thanks for the advise