Edit /etc/modprobe.conf and add alias scsi_hostadapter2 ahci Then rebuild your initrd with mkinird mkinitrd -f /boot/initrd-$(uname -r).img $(uname -r) Then reboot and make the BIOS change. This should give you much better disk performance. James B. Byrne wrote: > > ---------------------------- Original Message ---------------------------- > Subject: Re: [CentOS] Install CentOS-5.0 on HP-ComPaq DC7700 Dual Core > From: "James B. Byrne" <byrnejb at harte-lyne.ca> > Date: Mon, October 6, 2008 12:26 > To: cenos at centos.org > Cc: "John Newbigin" <jnewbigin at ict.swin.edu.au> > -------------------------------------------------------------------------- > > > On Sun, October 5, 2008 20:39, John Newbigin wrote: >> Also make sure you have the latest firmware and set the hard disk mode >> in the BIOS to Raid (Which will enable AHCI). >> >> John. > > By the time I received this message I had already installed the ia_64 > version of CentOS-5.2 with the BIOS set to IDE emulation. If now I change > the BIOS to use RAID then the system cannot see the SATA drive at all. > > Is it possible to change the BIOS setting to RAID and subsequently load > the necessary drivers from the boot DVD without having to reinstall the > entire system? > > If so, then what is the procedure? > > Regards, > -- John Newbigin ITS Senior Analyst / Programmer Faculty of Information and Communication Technologies Swinburne University of Technology Melbourne, Australia http://www.ict.swin.edu.au/staff/jnewbigin