odd slow read speed on cache drive

[ikosa]

i have an odd issue but i'm not sure who is guilty docker engine, container, hardware issue, fragmentation, fool me, etc

 

(i suspect that this started after i updated to unraid6.)

 

reading from transmissions downloaded folder (mapped in docker to my cache disk, cache only share) dramaticly slow! aprox. 5 times slover than usual:

if i copy a file from transmissions (running from gfjardim's docker) downloaded folder to a disk share (with mc) or to my windows desktop it copies around 8-15 MB/s. (file is not seeding and i'm testing this with a 5GB file)

but if i copy that file into root of my cache only share and try to copy from there it copies around 40-50 MB/s.

i cant figure out why. This issue dramaticly slows down my mkv muxing process for finished downloads.

 

Is this somehow related to docker volume mappings or dockers nature?

when i copy a file from docker mapped volume does docker.img somehow involved and slows down the operation?

is there a way or what is the best way to solve this issue?