10-27-2014 01:05 PM
I installed the RF-P2USB3 PCIe card in my 64-bit Windows 8.1 (Update 1) PC and attached two USB 3.0 bus-powered external drives to the card. The card itself and the two external hard drives are all recognized by Windows and operate correctly.
Every now and then I get a message from Device Manager that an Unknown USB Device is operating in Compliance Mode, which is used for testing USB devices. Further examination of the message indicates that Device Manager is referring to my RF-P2USB3.
Since the card itself and the drives work fine, can I just ignore the message about Compliance Mode? Why does the RF-P2USB3 display that message?
10-28-2014 10:03 AM
Welcome to Community@ Rocketfish™!
When you originally installed it, did you install the Rocketfish Driver, or did Windows install a generic? Provided the computer is able to see the Ext Hard Drives fine, it shouldn't be any issue. Do you notice any pattern to the Compliance mode activating, like when you are accessing a particular drive, or when you hook in a different USB 3.0 device? You may try "troubleshooting" the driver when you see it in compliance mode, Windows may have a newer version driver out that will keep that from happening.
10-28-2014 10:16 AM
Thanks very much for your help. I installed the RF-P2USB3 into a Windows 8.1 computer, so Windows installed its own driver. I wish I could determine a pattern or what makes the link go into compliance mode.
The last time this happened, I opened the property sheet for the 'Unknown Device' and clicked on a Disable button. I haven't experienced the problem since that time, so perhaps the issue is solved.
10-28-2014 10:40 AM
Thank you for responding!
My only concern with that is that doing that may be disabling the 3.0 functionality, have you noticed any difference in read/write timeframes?
10-28-2014 11:43 AM
CrtstalDiskMark shows the same speeds whether or nor not the "Unknown USB Device (Link in Compliance Mode)" is enabled or disabled. Also: My USB 3 external hard drives are used for backups, and my backup times are the same for the Rocketfish adapter as they were for my previous adapter (which stopped working after several years service.)
According to Device Manager "No driver files are loaded or are required" for the Unknown Device and "The SuperSpeed link to the USB device keeps going to an error state Compliance." Aside from that I have no complaints.
It seems like it might be a hardware issue, but in any case it doesn't seem to be causing a problem.
10-28-2014 12:22 PM
Thank you for responding!
All right then, as long as you're good, we're good. If you have any other questions crop up just give a yell.