When I type "hdparm /dev/hdg" I receive the following: multcount = 0 (off) I/O support = 0 (default 16-bit) unmaskirq = 0 (off) using_dma = 0 (off) keepsettings = 0 (off) nowerr = 0 (off) readonly = 0 (off) readahead = 8 (on) geometry = 2246/255/63 , sectors=36094464,start=0 It bothered me that my ATA66 hard drive wasn't running in Ultra DMA 4 mode, so I then typed "hdparm -d1 /dev/hdg" only to be greeted by the following: Operation not permitted What do I do to make my hard drive operate at it full potential? Background: I installed a Promise Ultra66 controller card. To install Linux Mandrake 6.1, I passed "ide3=0xfff0,0xffe4" to the kernel when the installation started. That allowed the kernel to see the Promise Ultra66 card and then install all files to hard disk. Please help! Thanks in advance, Matt ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com