Slow write speeds with Storage Space?

[XMan]

I'm using a 4x6TB pool with parity. Getting anywhere from 20MB to 30MB/s over USB3 direct connect. Took 3!!! days to transfer 7TB of MKVs. Is that to be expected?

 

[XavierMace]

No, that's abnormally slow.

 

[aigomorla]

cant say its abnormal without knowing what enclosure your running and what Raid Parity u were on.
Also you sure u didnt accidentally connect the usb cable to a usb2.0 port instead of a 3.0 port?

 

[XMan]

cant say its abnormal without knowing what enclosure your running and what Raid Parity u were on.
Also you sure u didnt accidentally connect the usb cable to a usb2.0 port instead of a 3.0 port?

The external drive was a WD easyStore 8TB USB3. Yes, it was plugged into a USB3 port.

Setup was Storage Space with parity. Drives are internal, running off internal SATA3 ports.