Thanks for the tip. But that confirms it's running at 5000M: /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 5000M |__ Port 2: Dev 3, If 0, Class=Mass Storage, Driver=usb-storage, 5000M
Weird, hey? It is almost like it's just not being allowed to get full speed though. I'm running Linux kernel 4.4.0 and 4.3.0 on the relevant machines. I did actually discover that initially, on one machine, I was accidentally using USB2, but after that facepalm moment and using usb3, only read speed went up -- writes still cap out at 27-28 mbyte/sec. Toby On Thu, 14 Jul 2016 at 17:44 Robin Humble via luv-main <[email protected]> wrote: > On Wed, Jul 13, 2016 at 07:25:25AM +0000, Toby Corkindale via luv-main > wrote: > >I've hit a strange issue with a new USB storage device. > >(Corsair Slider X2 64GB) > > > >On a Windows 10 laptop, it'll happily get ~75mbyte/sec writes.[1] > >Reads are even faster. > > > >However on my Linux workstation the best I can get is 27 mbyte/sec, and > the > >usual speed more like 9-10 mbyte/sec. ie. Awful. > >Reads aren't much better, at 37mbyte/sec. > > does 'lsusb -t' say it's running at 5000M? > eg. > > /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 5000M > |__ Port 3: Dev 2, If 0, Class=Mass Storage, Driver=usb-storage, 5000M > |__ Port 4: Dev 3, If 0, Class=Mass Storage, Driver=usb-storage, 5000M > > I guess there's a chance your device has been blacklisted for not playing > nicely with usb3 or something like that too. you could grep for its usb > ids under /etc/udev or /usr/lib/udev. > > cheers, > robin > _______________________________________________ > luv-main mailing list > [email protected] > https://lists.luv.asn.au/cgi-bin/mailman/listinfo/luv-main >
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