john doe wrote: > On 7/30/2020 4:41 PM, Dan Ritter wrote: > > Two things: > > > > - your CPU load, depending on how you measure it, may include > > processes which are waiting for I/O. This I/O is very slow, > > so. > > > > - not all USB3 devices are the same. Many implement a > > single-request system, where the kernel is only allowed to > > make a read or write call, then wait for the response, then > > issue the next call. Anything describing itself as a "key" > > is particularly likely to have this. > > > > Is there any way to verify this (command wize)?
$ usb-devices will show Driver=usb-storage for a slow device, and Driver=uas for a fast device. > > Can you change your external storage? > > Any suggestion? You're looking for a device that has UASP support rather than just USB Mass Storage. Some vendors make it easier to search for this than others, e.g. https://www.startech.com/HDD/Enclosures/?filter_UASP_YN=Yes will show you all the StarTech USB3 enclosures that do UASP. I don't have any specific recommendations. -dsr-
