Date: Mon, 15 Jan 2001 14:34:15 -0600 From: Matt_Domsch@Dell.com To: ragnar.wisloff@asker.online.no Cc: AIC7xxx@FreeBSD.ORG Subject: RE: Order of detection of scsi controllers Message-ID: <CDF99E351003D311A8B0009027457F1403BF9BBD@ausxmrr501.us.dell.com>
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Hi Ragnar. Thanks for writing.
> I've got a Linux system with an internal AIC 7899 and an
> attached RAID
> controller for internal disks and an AMI Megaraid controller
> in a PCI slot
> for external disks. The system came preinstalled with kernel
> 2.2.14. After
> upgrade of the kernel to 2.2.16, the kernel now detects the
> controllers in
> the opposite order to what it did previously and causes my
> sdaX and sdbX
> partitions to get swapped around. The driver modules
> (aic7xxx, aacraid and
> megaraid) are loaded from ramdisk images during boot (it's RHL 6.2).
The lines are in the wrong order in /etc/conf.modules now.
If you re-arrange the alias scsi_hostadapterX lines and make your initrd
again, it'll work like you want.
> Why does the kernel upgrade cause this effect?
I'm pretty suprised, that shouldn't have happened. When the
kernel RPM is installed, it changes the name 'percraid' to
'aacraid' in /etc/{modules.conf,conf.modules}. It must have written
the lines in the wrong order.
> Will a kernel recompile with the aic7xxx and aacraid drivers
> compiled in and
> the megaraid kept as module, plus using the reverse_scan argument in
> lilo.conf make the kernel do the detection in the previous
> (not necessarily
> correct) order.
Nope, reverse_scan won't help you. It's entirely a module load
order problem. Changing your /etc/conf.modules and making your
initrd again will solve it.
Thanks for buying Dell!
Matt Domsch
Dell Enterprise Systems Group
Linux Development Team
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