I found the following workaround: as root:
echo "min_power" > /sys/class/scsi_host/host4/link_power_management_policy where host4 correspnds to my ata5 in the error message. Now the error messages have stopped. I hope this helps with debugging -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1318218 Title: SATA problems on MacBook Pro 11,1? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1318218/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
