I shot myself in the foot by doing "hdparm -Y /dev/hbd". The disk went to sleep OK, but when I tried to access it later, the driver spit out a lot of DMA timeout errors and then the box hung hard. Some details FC2 kernel-358, the IDE controller is a VIA 8235, the disk is a WD 80 GB, slave on the 1st channel. My primary question is whether this is a bug that I should bugzilla or if this is just something one should never do? Thanks, John