If you have not disabled NCQ in /etc/default/grub, if you run fstrim -av
manually 3-4 times, one after the other, you will get data loss. It has happened to me with *buntus 14.04.2, 14.10, 15.04. If you disable NCQ in grub, everything is fine. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1338706 Title: Samsung SSD 840 failed to get NCQ Send/Recv Log Emask 0x1 failed to set xfermode (err_mask=0x40) on upstream kernels >= 3.12 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1338706/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
