Thanks for the speedy replies guys, I had an itch, so I itched it; In the back of my head I couldn't help but think I had miss-read the details about my mobo and that it was PCI-E not PCI-X and I was right, so the previous card is no longer an option although I am not liking the look of it thanks to the list members finding various problems for me (thanks guys, saved me some time and hassle there!) so instead I am looking at one of these (http://www.adaptec.com/en-US/support/sata/sataii/AAR-1430SA/). Its based on the Marvell 88SX7042 chipset which seems to work under CentOS 5, Hurray! -- Regards, James ;) Mike Ditka - "If God had wanted man to play soccer, he wouldn't have given us arms."