[Novalug] kernel pci probe question

[Mike Shade]

Mark,

Investigate what's necessary to boot via volume label rather than device
ID.  I have a wonky motherboard that between various revisions of the kernel
likes to rearrange the disks -- from those on the auxiliary SATA chipset to
those on the main motherboard and vice versa.  Here's an excerpt of my
/etc/fstab to show you what I mean.

LABEL=/                 /                       ext3    defaults        1 1
LABEL=/boot             /boot                   ext3    defaults        1 2

On Thu, Apr 3, 2008 at 5:23 PM, Mark Smith <mark at winksmith.com> wrote:

> i'm assuming the boot order is cdrom first.  i then boot off of a
> cdrom, it runs isolinux and in moments there is a running linux
> kernel.  what happens after that is the interesting bits.  /dev/sda,
> /dev/sdb, /dev/sdc, ... are fixed via the kernel's own pci probe.
>
> On Thu, Apr 03, 2008 at 05:17:05PM -0400, greg pryzby wrote:
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> > I don't recall the specifics, but I do recall that you can use by-name
> > and that uses a long identifier (or maybe it was by-identifier) that
> > isn't dependent on boot order.
> >
> > maybe I will research it later and see if I can find the answer....
> >
> > Mark Smith wrote:
> > > my company makes an appliance-like device which includes linux as
> > > its core.  our software is setup to use specific devices for specific
> > > file systems.  in particular we have one appliance with a RAID setup
> > > which is on sda.  the problem is that every now and then it shows
> > > up on a different device special file.
> > >
> > > my questions...
> > >
> > > is there any possible setting in the BIOS that can change the
> > > ordering of devices?  it was my understanding that the kernel does
> > > its own hardware probe and does not rely on anything the BIOS
> > > provides in that regard.
> > >
> > > what else could change the ordering of devices sans actually moving
> > > the card position in the chassis or the connectors on the disk arrays?
> > >
> > >
> >
> > - --
> > greg pryzby                              greg at pryzby dot org
> > fingerprint: 8A1A DB90 869F 5DD1 D6E9 EEB6 C156 6B04 849F A86F
> > -----BEGIN PGP SIGNATURE-----
> > Version: GnuPG v1.4.6 (GNU/Linux)
> > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org
> >
> > iD8DBQFH9UlQwVZrBISfqG8RAsjzAJ9GXxQzhs09cHMr+db7eCe4nDij0ACffzjt
> > BzdPxaMKU21YTTWTllFv2bo=
> > =IYul
> > -----END PGP SIGNATURE-----
>
> --
> Mark Smith
> mark at winksmith.com
> mark at tux.org
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