Defrag Running for Days! #23600598

The configuration is quite close to mine. RN104 with 4*4Tb raid 5 single volume, 55% space used. Mine takes less than two hours to defrag (1H23min according to logs). That said it is defragged regularly so there is nothing to do really. I think the rebuild time is between two and 3 days with an idle device, I would expect defrag to be completed in less than 5 days, specially if volume has free space to work with. Of course intensive use will slow the defrag.

Do you have SSH enabled ? if so, can you check the "top" command. I'm curious to see your %wa. If you have something like 40-60 %wa that's normal for defrag, if your are up to 90-95% something is wrong IMO as you should have the find command searching files and consuming CPU time too. Mine has between 20 and 70 %WA while defragging (I guess 70% when hitting a big file, 20% for small files, 50% most of the time).
If this is not enabled, is you web interface slow ? if you try to copy let's say a 1Gb file what is the speed ?
You may also check if you have nothing else using your CPU (torrent clients are a bad idea while defragging for example since they are creating fragmented files every second).