Reverting to Heisenbug did not entirely eliminate SATA crashed under disk activity load. The ASUS X79-Deluxe that runs omen.com has three SATA controllers: Intel® X79 chipset : 2 x SATA 6Gb/s port(s), black 4 x SATA 3Gb/s port(s), black, Support Raid 0, 1, 5, 10 Marvell® PCIe 9230 controller : 4 x SATA 6Gb/s port(s), dark brown ASMedia® ASM1061 controller : 2 x SATA 6Gb/s port(s), dark brown 2 x Power eSATA 6Gb/s port(s), green In the last crash, the active disk was on one of the non Intel controllers. As before there was nothing in the log files. The screen showed error messages on /dev/sdf. I changed SATA connectors so the root drive is on the Intel controller. -- Chuck Forsberg WA7KGX caf@xxxxxxxx www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc "The High Reliability Software" 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 -- test mailing list test@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe: https://admin.fedoraproject.org/mailman/listinfo/test