sda sdb auto renamed to sdc sdd, boot fail

[gobble]

First encountered in CR Bug #270118 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/270118 for 8.0.4 32 bit
Turns out that this is an arbitrary problem. The only thing that saved me from a complete boot fail was the UUID disk string in grub.

The fstab entries were looking for a sda and sdb device while during this boot they were renamed to sdc sdd.
This time the problem recurred for 8.0.4.2 64bit
Linux owl 2.6.24-23-generic #1 SMP Mon Jan 26 01:04:16 UTC 2009 x86_64 GNU/Linux

Looks like inserting a SD MMC card in my Dell 2408WFP results in renumbering - the SDMMC becomes sda while the HDD becomes sdc. Possibly might occur only when Bios detect for USB HDD is enabled - I will post update about this after reboot check with bios feature disabled.

Attaching dmesg and dmesg.0 showing that disks have been renamed.

My guess is the kernel scsi driver code needs fixing.

TIA

PS: I generated this with the ubuntu-bug cmd, but don't see any info attached. Let me know if you need more info.

ProblemType: Bug
Architecture: amd64
Date: Mon Feb 2 22:44:15 2009
Dependencies:

DistroRelease: Ubuntu 8.04
NonfreeKernelModules: fglrx
Package: linux None [modified: /var/lib/dpkg/info/linux.list]
PackageArchitecture: amd64
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=en_IN
 SHELL=/bin/bash
SourcePackage: linux-meta
Uname: Linux 2.6.24-23-generic x86_64

[gobble (gobbledegeek)]

Mobo is AMD 780G

[gobble (gobbledegeek)]

Just in case you need it ...

[Chris Coulson (chrisccoulson)]

You cannot guarantee that devices will be enumerated in the same order each time you boot, especially when you sometimes boot with some removable hardware connected. This is not a bug. By default, Ubuntu uses UUID's in /etc/fstab to prevent this from causing a problem. If you've chosen to use device nodes in your /etc/fstab, then you have to be prepared to accept the downsides of doing this