Hi Sarah, My name is Don Zickus and I am going to be responsible for keeping USB and friends happy in RHEL-6. We were doing some performance testing with USB3 and notice it didn't seem to be as fast as some of the windows benchmarks. I wanted to know what your expectations were for throughput with USB3 devices and controllers were, so I could communicate them if people complained. The USB components is mostly based on 2.6.32 + stable fixes to give you a baseline. We have been using 'hdparm -t' as our quick and dirty performance tool with the usb3 harddrives we have. Using a WD My Book 3 we get about 25MB/s throughput and a Buffalo HXU3 gets about 82MB/s. Various test with Windows showed higher numbers, like 80MB/s and 102MB/s respectively. Just trying to figure out if the bottleneck is a scsi or a usb problem. Also it seems like USB3 is still going through a bunch of churn. Any heads up on good chunks to have or to look out for would be great to help promote USB3 on RHEL-6. Thanks! Cheers, Don -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
