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Date: Wed, 06 Nov 2002 18:56:11 -0800
From: Andrew Morton <akpm@digeo.com>
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To: Miles Lane <miles.lane@attbi.com>
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Subject: Re: EXT2 corruption -- After running 2.5.46, my root partition cannotbe 
 mounted by older kernels
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Miles Lane wrote:
> 
> Hi,
> 
> I am not sure how to diagnose the problem.  When I try to boot
> the latest RH 8.0 kernel, I am informed that some unsupported
> extensions are present on /dev/hda12 at boot time.  The partition
> fails to mount and the boot process halts.
> 
> I have no trouble booting with 2.5.46.
> 

Please send the exact diagnostic message.