---------------------------- Original Message ---------------------------- Subject: Re: [CentOS] Install CentOS-5.0 on HP-ComPaq DC7700 Dual Core From: "James B. Byrne" byrnejb@harte-lyne.ca Date: Mon, October 6, 2008 12:26 To: cenos@centos.org Cc: "John Newbigin" jnewbigin@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,
James B. Byrne wrote:
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.
There is no ia64/ CentOS-5.2
There is no ia64/ CentOS-5.2
x86_64
The substantive question remains unanswered. Can I install the new disk drivers for SATA AHCI from the 64 bit CentOS-5.2 boot dvd without having to reinstall the entire OS or not?
Regards,
James B. Byrne wrote:
There is no ia64/ CentOS-5.2
x86_64
The substantive question remains unanswered. Can I install the new disk drivers for SATA AHCI from the 64 bit CentOS-5.2 boot dvd without having to reinstall the entire OS or not?
you probably just need to force them into the initrd, while the system is still set to IDE, then set for ahci and reboot, and it likely will work.
however, off the top of my head, I don't remember the correct incantation for this.... also, the precise AHCI SATA driver varies by chipset.
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@harte-lyne.ca Date: Mon, October 6, 2008 12:26 To: cenos@centos.org Cc: "John Newbigin" jnewbigin@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,
-
James B. Byrne -
John Newbigin -
John R Pierce -
Karanbir Singh