- B+B Industrial USB Hub
Re: B+B Industrial USB Hub
Stuart Heggie <stuart.j.heggie@...>
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Joe, that is cool - I will look into this. Thanks!
On Wed, Nov 11, 2015 at 11:41 PM, 'Joseph Zeglinski' J.Zeglinski@...
Something else you should check is your PC BIOS. Found
this comment about slower than expected SSD transfers. Should be equally
true for USB-2 ports, like external hubs on the PC:
If you still have the problem with slow speeds on
Toshiba's USB 3.0 port(s) (in my case), just disable USB Legacy
Emulation in BIOS. Even if the USB 3.0 controller is enabled in
BIOS, the user always will get maximum 33-34MB/s against 77-85MB/s when
legacy mode is off. This solution probably will work
on other brands with USB legacy devices support in their
There are suggestions about determining the
USB type that a port is working on – whether it has throttled down perhaps
– but no obvious software benchmark to calculate the actual “throughput”
on an assigned USB I/O port. Those, as from PASSMARK, require an expensive
loopback plug device, and only test the port capability, but not actual
total throughput, coming in from a mix of devices (hub population). It
would be nice to have a utility that can “watch a USB port”, and graph its
activity. Then it would give us some idea if, or when, our device mix on a
hub, is just too unbalanced. Getting errors or lost frames from some
device isn’t enough. Getting some idea of the frame error rate would also
be valuable. Then there would be no surprises from the telescope USB
Typical tests are limited to USB Storage
Devices, and calculated predetermined file size transfers.
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