got unraid since 2 weeks comming from synology DSes. i indeed thought also the cache function of unraid does include read cache. in my usecase files are much more often read than written. so this feature would be the gamechanger in my usecase. presently access speed is dropping redicouless over night as the file gets moved to the array. however i find the present cache functionality with that mover quite good, but miss something like that for read access. a simple one as MAM59 is asking for would do. but would be as mentioned a gamechanger.