Also sprach "Thomas H. George" <xyz@spininternet.com> (Wed, 27 Apr 2005 10:51:27 -0400): > The response to the command hdparm -d 1 /dev/hdb is > > /dev/hdb: > Setting using-dma to 1 (on) > HDIO_SET-DMA failed: Operation not permitted > using_dma = 0 (off) it tries to set the dma flag on the _ide_ device, but fails. both, the ide and the harddisk have to support dma & the right (kernel) driver for the ide interface has to be loaded. (dmesg, lspci) sl ritch.