new kernel will not boot

[Michael H. Warfield]

On Wed, 2008-10-15 at 08:18 -0400, Steve West wrote:
>  
> I have compiled a new kernel and it cannot find the filesystem to
> boot. How do I specify in the kernel confg what disk to boot?

	You've left off a lot of details so I have no idea if this applies to
you or not but watch out for a race condition in initrd.

	https://bugzilla.redhat.com/show_bug.cgi?id=466071

	Really only applies to certain SCSI drivers (most notably VMware SCSI
devices) with the dm- modules compiled in and running lvm.  This burned
some of us with the latest 2.6.27 builds in rawhide and similar
configurations.  It results in lvm running too soon, before the drivers
have settled and it can not find any physical volumes.  Consequently,
you can find the root file system.

	Workaround:  In /etc/sysconfig/mkinitrd add the following:

MODULES="scsi_wait_scan"

	Then rebuild your initrd.

	Since you said it "cannot find the filesystem to boot", I'm not sure if
you mean the actual "boot" file system (did you even get a grub prompt?)
or if you got the "unable to mount root file system" when booting.
Exact error messages are always helpful.

> Steve

	Mike

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Michael H. Warfield (AI4NB) | (770) 985-6132 |  mhw at WittsEnd.com
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