My apologies in advance for asking such an elementary question. I called myself searching the Installation Guide and Deployment Guide, with no success. The situation is that I bought a Lite-On ATAPI iHAP122 that will not burn DVDs unless I use hdparm to turn dma off. I bought that drive because it was a rare beige drive. Until I can find a decent DVD burner and/or get a Windows machine put together strictly for doing BIOS updates, running with dma disabled seems to be the best solution. (hdparm -d0 /dev/hdb ) So, my question is, where should I script the command without having to become root each time I wat to burn a DVD? 2.6.18-164.9.1.el5PAE #1 SMP Tue Dec 15 21:41:47 EST 2009 i686 athlon i386 GNU/Linux This is how it always fails: [rj at madeleine ~]$ growisofs -dvd-compat -Z /dev/hdb=/home/rj/KNOPPIX_V6.2DVD-2009-11-18-EN.iso Executing 'builtin_dd if=/home/rj/KNOPPIX_V6.2DVD-2009-11-18-EN.iso of=/dev/hdb obs=32k seek= 0' /dev/hdb: "Current Write Speed" is 16.4x1352KBps. :-[ WRITE at LBA=30h failed with SK=4h/ASC=08h/ACQ=03h]: Input/output error :-( write failed: Input/output error /dev/hdb: flushing cache /dev/hdb: updating RMA /dev/hdb: closing disc [rj at madeleine ~]$