On Feb 3, 2012, at 5:02 PM, wwp subscript@free.fr wrote:
Hello Ross,
On Fri, 3 Feb 2012 16:01:53 -0500 Ross Walker rswwalker@gmail.com wrote:
On Feb 3, 2012, at 1:34 PM, wwp subscript@free.fr wrote:
Hello Jerry,
On Fri, 03 Feb 2012 12:24:14 -0500 Jerry Geis geisj@pagestation.com wrote:
I am trying to install 6.2 on a machine. I am using PXE as I have done so a number of times.
My hard disk is being detected as sdb and not sda. My kickstart config is wanting it at sda.
There are no other disks in the unit. It has and SD slot and an esata although BIOS does not appear to have a disable for either of those devices.
Is there anyway to "force" the disk to sda ? or find out what its detecting at sda and disable that from the PXE boot line?
Doing " dmesg | grep sda" does say SCSI removable disk.
So how can I tell linux to NOT include that when installing?
I noticed that behaviour with my CentOS6 (installed and kept up-to-date using yum). This happened since kernel kernel-2.6.32-220.el6.x86_64 and furthers updates. Was working as expected (my laptop's hdd mounted as sda) with previous kernels, up to kernel-2.6.32-131.21.1.el6.x86_64.
I wonder if that behaviour, and the *change* of behaviour is an issue that should be reported, and how to handle it on installed systems! For now, I'm either booting w/ no USB disk plugged, or booting a 2.6.32-131 kernel.
You can try disabling USB disk support in the bios.
Right, but I can't make such settings permanent, as I need to boot from a USB disk from time to time, thus, entering BIOS and changing settings costs more than unplugging stuff :-).
An aspect of the problem w/ that behaviour change introduced w/ recent kernel updates, is that some mount mapping tables (fstab for instance) are broken if they rely on mount order (sda, hda, etc.) instead of device ID or label.
I remember faintly there was abway to specify module order in C5 modprobe and regenerate the initrd to make it persistent, but I don't think C6 uses modprobe. Maybe there is an initrd option under /etc/sysconfig.
Once that's done you can re-enable USB disk support in the BIOS.
-Ross