Aapole

Thanks Enigma2Illusion, No errors were found on any of the disks after running the long tests on the disks - and detailed review of the smart data of the disks after that, still nothing indicating errors. I run also data scrubbing on the drive (btrfs) where the aforementioned volume is, just to see if it founds any mistakes. Also went ok. These took a few days to drive. So at least it seems that the disks are ok. It seems that it is not a problem with the disks, but with something else, possibly...

Thanks Enigma2Illusion, Event Viewer shows that: Event ID 137 NTFS The default transaction resource manager on volume X: encountered a non-retryable error and could not start. Event ID 50 NTFS {Delayed Write Failed} Windows was unable to save all the data for the file \x.x. The data has been lost. This error may be caused by a failure of your computer hardware or network connection. Please try to save this file elsewhere. NW is already tested (different route), next step is to test all drives within...

In the past, I have used approx. 10TB and 18TB Veracrypt volumes, a couple of years ago when I changed NAS, I created 40TB NTFS volume (yep, mainly using Win10). Slowness when writing to the volume: For some reason, recently the volume in question has seemed slowing down as it has filled up when I've transferred larger amounts of files, i.e. ~500GB at a time. Unfortunately, I haven't measured this. Freeze when writing to the volume: Now I noticed while doing the transfer that the data transfer freezes...

In the past, I have used approx. 10TB and 18TB Veracrypt volumes, a couple of years ago when I changed NAS, I created 40TB NTFS volume (yep, mainly using Win10). Slowness when writing to the volume: For some reason, recently the volume in question has seemed slowing down as it has filled up when I've transferred larger amounts of files, i.e. ~500GB at a time. Unfortunately, I haven't measured this. Freeze when writing to the volume: Now I noticed while doing the transfer that the data transfer freezes...