Is there a particular reason why you're using a block size of 512M? Have you tried just leaving it at default?
Have you tried changing the scheduler for sdb to "deadline"? echo deadline | tee /sys/block/sdb/queue/scheduler Have you tried changing the scheduler of ALL disk devices to deadline? I'm not 100% sure that this would not happen on pretty much all Linuxes, as USB is pretty slow. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1030516 Title: 152d:2338 High IO when writing to USB devices To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1030516/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
