This could be caused by bad drives http://community.wdc.com/t5/Desktop/WD-1-5TB-Green-drives-Useful-as- door-stops/td-p/1217. Or a duplicate of 676644?
I will buy some Hitachi units this week and see. If things work well I will RMA the drives. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/718598 Title: ATI Technologies Inc SB700/SB800 SATA Controller [AHCI mode] causes exception Emask errors when run at 6.0Gb/s (SATA 3) -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs