I have always had transfer rate problems during an upload. When I upload a large file (an .iso file of 40GB for example), the transfer rate is about 100MB/s for 5 seconds, then progressively decreases to 20MB/s in 1 minute. Then it stagnates at 20Mo/s until the end of the copy.
At first I thought it was a problem with the SMB protocol. I tried to change some parameters on the SMB protocol that I saw on several forum threads, but it did not work.
I then tested the FTP protocol, and I have the same problem.
Intel Celeron 2,3 Ghz
RAM 8 GB
RAID 5 software (4 x 1TB)
For the FTP part, I tested FileZilla or Cyberduck, no change.
Ideas ? thank you in advance