Hey Doug, I tried as you suggested... only that didn't help. So I actually had to get down into the guts to figure out what was going wrong. It turned out to be a bug in the block layer of the 3.18 kernel that required a one line change. With that fixed, the FastWrite patch works like a charm. Thanks! 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 ��.n��������+%������w��{.n�����{����w��ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f