It also happens with kernel 3.13.2-031302-generic #201402061638 (from http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.13.2-trusty/)
Based on previous comment of Ilya Murav'jov I "solved" it temporally with powertop. I disabled powersaving modes of these devices: PM ejecutable para dispositivo PCI Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 PM ejecutable para dispositivo PCI Intel Corporation 5 Series/3400 Series Chipset 4 port SATA AHCI Controller -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/119730 Title: Slow SATA performance To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/119730/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
