With the default settings in my Supermicro motherboard CentOS calls my SATA drive /dev/hda. If in bios setup I change 'Native Mode Operation' from auto to 'Serial ATA' it boots up calling the drive /dev/sda. I keep thinking its likely better under /dev/sda not? Any problem switching it to that after install? Matt
On Wed, Aug 18, 2010 at 1:23 AM, Matt <lm7812 at gmail.com> wrote:> With the default settings in my Supermicro motherboard CentOS calls my > SATA drive /dev/hda. ?If in bios setup I change 'Native Mode > Operation' from auto to 'Serial ATA' it boots up calling the drive > /dev/sda. ?I keep thinking its likely better under /dev/sda not? ?Any > problem switching it to that after install?If you have setup lvm and use labels for mounting your filesystem, the change should be hassle free. Otherwise you have to check grub.conf for the root parameter and change blockdevices in /etc/fstab.
> With the default settings in my Supermicro motherboard CentOS calls my > SATA drive /dev/hda. ?If in bios setup I change 'Native Mode > Operation' from auto to 'Serial ATA' it boots up calling the drive > /dev/sda. ?I keep thinking its likely better under /dev/sda not? ?Any > problem switching it to that after install?So I guess another question here. Is it better to my SATA interface in Serial ATA mode or AUTO in BIOS? The motherboard calls it sda when in serial ata mode but hda when in auto mode. Will there be a performance difference? Matt
On Thursday, August 19, 2010 10:54:32 am Matt wrote:> So I guess another question here. Is it better to my SATA interface > in Serial ATA mode or AUTO in BIOS? The motherboard calls it sda when > in serial ata mode but hda when in auto mode. Will there be a > performance difference?It depends on which kernel module gets used, and which version of CentOS we're talking about as to which will perform better. So research the libata module that drives it when in SATA mode (/dev/sda) versus the straight IDE layer (/dev/hda). Later kernels and newer CentOS is going to go to /dev/sda either way; /dev/hda is gone from later dists. Which Supermicro board is this?