Dana Wed, 17 Mar 2021 19:19:20 -0700 (PDT), nelso...@gmail.com
 napis'o:
> On Wednesday, March 17, 2021 at 5:15:16 PM UTC-5, Jim Jackson wrote:
>> On 2021-03-17, nelso...@gmail.com  wrote:
>> >
>> > pi@rpi4b:~ $ sync; sync; sudo hdparm -t /dev/sdc
>> > /dev/sdc: {8TB 3.5 HDD 5400rpm}
>> > Timing buffered disk reads: 100 MB in 3.01 seconds = 33.25 MB/sec
>> >
>> That speed looks like it is running at USB2 speeds. Are you sure the USB
>> adpapter is USB3? Maybe it's USB2
>
> Orico SATA3.0 - 6Gbps enclosure  {USB3.0+SATA III; Support capacity 16TB;
Support UASP}
> Seagate Barracuda 8TB HDD
>
> It should be as fast as the other drives.

Try testing it without other drives connected to that USB hub.

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