[Xen-users] XenU crashes on kernel upgrade

[emanners <emanners@xxxxxxxxxxxxxxxx>]

System specs
ACompaq SP750, Dual Pentium III's, 1GB RAM 2 SCSI drives as one LVM unit 
60GB, 1 ide drive 120GB(not being used), FC5, xen-3.0.2-3.FC5
Dom0 - 25GB avail ~750MB ram, 2.6.17-1.2174_FC5xen0 #1 SMP
DomU - 8GB total, 3GB avail, 256MB Ram, 2.6.15-1.2054_FC5xenU #1 SMP

Whenever I upgrade to 2.6.17-1.2174_FC5xenU with yum and reboot the domU 
crashes irreparably. I dont even get the option of choosing *which* 
kernel to boot from. I didn't have X installed on dom0 at that point so 
I couldnt send the error message in the email then but I will makeit 
happen again f I have to paste the error message.
That brings me to my real problem. I haven't been able to find 
documentation of how to make a backup copy/clone of a domU. I am very 
new to xen and have been working on it fervently for about a week.
I've tried copying the image file and the config file but when I mess up 
my running image I'm forced to run fsck on the backup when I swap it in. 
Is there some 'proper' way of making a copy of a domU that resides on 
the same machine. I would liek to be able to experiment and blow away my 
domU which the confidence that I can restoreit without having to 'fix' 
things.
Thanks



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