Mailinglist Archive: opensuse-autoinstall (67 mails)

[Steffen Winterfeldt <snwint@xxxxxxx>]

On Mon, 30 Mar 2009, Frank Steiner wrote:

> Steffen Winterfeldt wrote
>
> > Could it be the other modules have already been loaded (by udev at startup)?
>
> Where could I see that? The output on console 3 starts with "remount of / ok",
> followed by a list of modules that I haven't specified (like lockd.ko, fan.kom
> nfs.ko etc.). Then follow some of my own modules, as described.
>
> I pressed Ctrl-S after I saw my modules started to load and then
> switched to console 9 and typed "lsmod". Indeed I see a lot of modules,
> like the e1000 or ata_piix in this list.
>
> Does it mean they were already loaded? If so, why did that happen?

udevd is responsible for module loading (as in the installed system).

> If all those modules are preloaded at some stage, then I could never
> ensure that a SCSI disks is detected before a SATA disk if ata_piix
> is always loaded before my own SCSI modules via insmod. I thought
> the insmod mechanism is meant to load modules before any other modules
> are loaded automatically, to override the order in which hardware
> is detected.

'insmod' was there to load modules that were (for whatever reason) not
loaded automatically.

> My current problem is that the card reader devices fetch sda-sdd and
> the SATA disk is sde. I need the SATA disk to be sda and I can't start

You should really not rely on specific device names. The kernel does not
guarantee a defined initialization order.

> to work with by-id or by-path because we have too many different hosts
> systems (IDE+SCSI, Sata+SCSI, Sata+FC, IDE+Sata etc.). The only method
> we ever found to handle all of those was to ensure that the main disk
> is always detected as first disk by load-ordering the modules.

What is the 'main disk' for you? The one you will boot from? Then maybe
/dev/disk/by-id/edd-int13_dev80 is a way.

> So how can we ensure the sata disk is detected before the USB devices?

AFAIK, you can't (in a sensible way). If it's any help to you, you can get
back the pre-SLES11/11.1 behavior with 'linuxrc.debug=-udev.mods' which will
turn off module loading in udevd and linuxrc takes care again.


Steffen
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