SMB horrible performance with 6.0.535-00158 copy multi-gigabyte files

[DavidLB]

I'm copying multi-gigabyte video files from my Windows 10 machine to my F8 which I have configured as with a single 256GB system drive and 4x2TB SSDs in a JBOD with recycle and system snapshots as this is just a duplicate copy device. I have 3 shared folders and the Time Machine Backup enabled. The copy is to one of the shared folders that has been mounted to drive O: on my PC.
I'm using the Opensource program FreeFileSync with just 1 thread for the copy, so essentially 1 file at a time.
It starts out running close to the maximum of 100M/s on my 1Gbps Ethernet port, but after a few seconds the rate starts to drop until it finally hits somewhere around 2.5M/s where is stays. Doing this same operation to my Synology NAS keeps it pegged at 100M/s the entire time, so it's not a network problem.
I checked the SMB settings between the two systems and they are almost identical. (see attached photos)
I really think this is a TOS issue and should be easy for you to reproduce.

[TMroy]

This fault phenomenon is usually related to hardware. Please first check if the disk is properly installed, or try replacing the disk and try again. May I ask what brand and model of disk you are using? There are many different types of NVMe disks on the market, and not all models are compatible. The 6.0.535 SMB version has undergone extensive laboratory testing and is being used by a large number of users. No speed issues have been reported so far.

[DavidLB]

I'm using 3 different SSDs in 2 F8s:
Sabrent SB-Rocket-NVMe4-2TB firmware version RKT4B5.1
Samsung MZVLQ1T0HBLB-00BTW firmware version FXM7201Q
Samsung MZVLQ1T0HBLB-00BH1 firmware version HPS1NFAV

Why is it only large video files? Small files copy just fine. I currently have over 2TB of data on each F8.
Have you tried replicating exactly what I did?

[DavidLB]

Well, I must admit that the problem lies in the external FLASH drive I was using to perform the test. Apparently, it was having read issues.
I am now copying directly from the internal drive on another computer and I'm seeing 100MB/sec pegged the whole time. As it should.
I apologize to the TOS team for posting the original message.
Is there a way we could just delete the entire thread?

[TMroy]

No, there is actually no need to delete that post.