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.

  --Steven

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