Hi, On 09/10/2014 10:54 PM, Douglas Gilbert wrote: > On 14-09-10 08:13 AM, Hans de Goede wrote: >> Hi All, >> >> I'm mailing all of you because you've reported various problems >> with the new uas support in kernel 3.16 and later. >> >> I've been working on making the uas driver more resilient to >> errors, as well as improved logging so we can easier figure >> out the cause of errors. >> >> I would like to ask you all to test a standalone version of >> the new uas driver with the devices you've been having >> trouble with before, and report the results to me. >> >> Testing instructions: >> >> 1) Remove any usb-storage.quirks= setting from the kernel commandline, >> and remove any /etc/modprobe.conf* files doing the same, boot your >> machine without the uas device attached. >> >> 2) Make sure your machine is set up for building kernel modules, >> usually this means installing kernel-devel and gcc packages, see >> your distributions documentation for more info >> >> 3) Download all files from here: >> https://fedorapeople.org/~jwrdegoede/uas/ >> And put them all in a single directory, named e.g. uas >> >> 4) Start a terminal, cd into the uas directory >> >> 5) Run the following commands: >> make >> sudo rmmod uas >> sudo insmod ./uas.ko >> >> 6) Connect your uas device >> >> 7) Wait for the disk to show up (wait circa 1 minute max), then do: >> >> dmesg > dmesg.log >> lsusb -v > lsusb.log >> >> 8) Test the uas disk >> >> Once done please send me a mail, in this mail please >> >> 1) Describe how the disk worked, did it show up in a reasonable time, >> and did it work? >> >> 2) Attach dmesg.log and lsusb.log > > Could you give some sort of indication of the dd throughput > time (on READs) with UAS given a recent SATA SSD that can > source data faster than 300 MB/sec (say)? I've done tests with 3 dd running simultaneously, reading data from 3 different parts of the disk, and I'm getting about 110 MB/s for each dd, so about 330 MB / s in total. This is with a Crucial M500 ssd, with both asm1053 and nec chipsets. > My ASM1051 based dock under W7 got an underwhelming maximum > of 42 MB/sec with such a SATA SSD. And I saw enough stupid > meta-data from SCSI commands to suggest that product should > be binned. 42 MB/s sounds like you're running over USB-2 not USB-3 (although for USB-2 it is very good, but uas should be able to get pretty close to saturating the bus with USB-2). Regards, Hans -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
