I've purchased several new USB 3 capable drives to use with my new (USB 3 capable) laptop. They connect ok but I suspect they're silently falling back to USB 2. The sustained transfer rates I'm seeing are around 30 Mb/s for both reads and writes, well within the practical limits of USB 2. One of the drives in particular is rated for transfers well in excess of 100 Mb/s so this is surprisingly (and suspiciously) low.
My question is.. how can I conclusively determine the USB connection speed being used by these devices?
I've poked about in the drive properties and run various diagnostic tools (like SIW). The only information I can extract is that they are indeed connected over USB (duh) but no info on the specific connection speed. The only suggestions I can find online are to benchmark the drives and "if its over 30-40 Mb/s it must be USB 3!" but this seems generally pretty vague and, in my case, inconclusive.
- Laptop is an
Windows Server 2008 R2 Standard
- Reading and writing to the internal SSD (so no bottleneck there)
- USB drives are a
Toshiba Canvio Basic A1 2.5" 1TB USB 3.0 Externaland a
SanDisk CZ80 Extreme 64GB USB3.0 Flash Drive
EDIT/SOLVED -- My root problem here was driver related; I'd tried to manually install
Intel USB 3.0 eXtensible Host Controller Drivers for Windows 7 on Server 2008 R2 (since no server drivers are available). In doings so I appear to have missed one or more devices. By following these instructions I've been able to coerce the driver installer to run correctly, fixing the issue. The SanDisk is getting 170 MB/s reads, 130 MB/s writes and the Toshiba is getting around 110 MB/s.