USB 3.0 Performance problem

[C0MM4ND3R]

After upgrading my System from Truenas CORE to SCALE my External HDD Case attached over USB-3.0 has only 5MB/sec transfer Speed.
I changed NOTHING with my Setup and reattached it several times with countles reboots etc.
When i connect it to a Windows machine i can Transfer Files at 150+mb/sec. Connected to my Truenas system i get 112mb/sec(nic limited) for about 20 sec. over FTP.
After that it drops to 5MB/sec for the Rest of the Transfer. The same happens when i use the "mv" command from internal Drives to the external Drive.

 

[Arwen]

Moving from TrueNAS Core to SCALE is not an upgrade. It's more of a side grade. SCALE is still under noticeable development, so changes may still occur.

Next, USB attached storage for data pool members is discouraged for multiple reasons:

Why you should avoid USB attached drives for data pool disks

This subject has been coming up quite often in the last year or 2. Perhaps because of TrueNAS SCALE has brought forth some attention to TrueNAS in general and ZFS in specific. Please note that this is about USB attached storage for ZFS data...

www.truenas.com

Basically, use USB attached storage for data pool disks at your own risk. It is likely their are not many on the forums who have that type of setup.