Re: [Xen-devel] ttylinux unable to mount root fs on gentoo

[Steven Hand <Steven.Hand@xxxxxxxxxxxx>]

>> Interesting - this message means what it says, viz.\ the guest kernel has
>> no idea about the device 0801 (/dev/sda1). It should have received info
>> about this via the control interface during boot -- what does
>> /var/log/xend.log or /var/log/xend-debug.log in domain0 say? (it may be
>> useful to "tail -f" one or both of them during the guest boot). Do you see
>> "xen_blk: Initializing virtual block device driver" on the guest console
>> during boot?
>>
>> cheers,
>>
>> S.
>>
>
>Yes, "xen_blk: Initializing virtual block device driver" appears on the guest 
>console but so does "register_blkdev: cannot get major 8 for sd".

Ok - the second message is interesting but probably not the main cause... 
an easy thing to try is to boot a XenU kernel rather than a one with
device drivers built in (e.g. your boot messages show that you have 
a bunch of 'real' device drivers (CISS, e100, pcnet32, aacraid, 3ware, etc) 
which won't work). 

However as mentioned the real problem is probably: 

  File "/usr/lib/python2.3/site-packages/xen/xend/server/blkif.py", line 335, 
>in configure
>    raise VmError('vbd: Device not found: %s' % self.dev)
>VmError: vbd: Device not found: sda1

Looks like there is no /dev/sda1 in domain0, which is odd since you 
previously mentioned there was. 

Mark's potential fix (i.e. use 0801 in place of sda1 in the 'disk=[' 
line in the config) is probably worth a try. 


cheers,

S.




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