Hi,
the driver where the cache is located is a Seagate Barracuda 2.5” 2TB SATAIII (the main Windows driver). It is in a sort of “RAID” with the Intel Optane Memory. My system is a Intel Nuc 7th i5.
I made some other test in the last days. I copied some file of 20/30 GB without any issue with an empty cache. Moreover, when the copy is 40/50 MB/s, the use of HDD is lower than 100% (about 80/85). But, when the copy issue occurs, the percentage is always 100 and the entire system becomes very slow...
Let me know if you need other info.
thanks.