Qnap Warning
It sounds like Drive2 is failing and will need to be replaced. I would be very nervous about rebuilding a RAID5 made up of 3TB disks.
Bad block HOWTO for smartmontools
This article describes what actions might be taken when smartmontools detects a bad block on a disk. It demonstrates how to identify the file associated with ...
SMI MPTOOL Error Code List N0109
0x11, Bad block over Setting, Total bad block over the BBOption. 0x12, Check Open/Short Fail, Check Open/Short Fail. 0x13, Pre-scan Early Bad Fail, Pre-scan ...
Fixing bad blocks..
Using MTTY shows a few bad blocks, but not sure if they are related to this problem. Anybody with clues as to what's going on or how to fix? I'm ...