On Sat, Jul 16, 2011 at 7:31 AM, Kanwar Ranbir Sandhu <m3freak at thesandhufamily.ca> wrote: .................. > I have all of the SATA channels set to AHCI mode, which includes the > Pioneer burner. I was thinking that maybe I should try changing the > BIOS setting to IDE, but then tossed it aside as crazy talk. > > After your email, I decided to change the DVDRW drive's SATA channel to > IDE mode. Bingo! The CentOS 6 DVD booted. I have CentOS 6 running and > fully updated now. > > I haven't looked into why the SATA Pioneer DVDRW needed AHCI disabled in > order to boot off the CentOS 6 DVD. Since the Fedora 15 DVD booted > without issue, I can only surmise isolinux in CentOS 6 and in Fedora 15 > behave differently. Hmm. I am facing an unrelated problem [1] but the root cause could be similar to your problem. I'll try changing SATA from "enhanced" to "legacy" mode. [1] Linux Mint Debian Edition installs successfully, BIOS is able to see the hard drive but complaints there is no boot disk! -- Arun Khan A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?