Variability in file transfer

[Fishypops]

I often experience large variabilities of file transfer to my unraid server.  Attached is a video showing a file transfer; the speed starts off at 90 MB/s then dips down to 3 MB/s, going back up to the 30's then 50's then back down again. Sometimes it can grind to a complete stop then run at less than 1 MB/s for sometime.

 

Can I address this without adding a cache drive ?

 

Hard Drives:

 

Parity:  WD60 EFZX

2 X : WD30 EFRX

1 X : WD60 EFRX

 

Thanks for any help.

 

 

 

[JorgeB]

Are you really still on v5? Also please post the diagnostics (assuming you are on v6).