Sorry... I should have mentioned that I'm running the 3.18.4 kernel with a 32 core xeon and 128G of memory. I'm not using a FS, I'm going directly to the raid block device. Bob Kierski Senior Storage Performance Engineer Cray Inc. 380 Jackson Street Suite 210 St. Paul, MN 55101 Tele: 651-967-9590 Fax: 651-605-9001 Cell: 651-890-7461 -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html