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Re: [Xen-users] CDROM on PV domU

from [Wolf Grossi]

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Subject:	Re: [Xen-users] CDROM on PV domU
From:	Wolf Grossi <wg@xxxxxxxxxxxxxx>
Date:	Thu, 29 Apr 2010 13:36:06 +0200
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[snip]

I have created to day a new VM on an OpenSuse 11.2, here is the part of
the config file cncerning the disks :
disk=[  'phy:/dev/HUGE_1/XXXXXXXXX_SYS,hda,w',
        'phy:/dev/HUGE_1/XXXXXXXXX_DAT,hdb,w',
        'phy;/dev/SYSTEM/XXXXXXXXX_LOG,hdc,w',
        'phy:/dev/sr0,hdd:cdrom,r',


This is remarkable, I use a similar entry for the cdrom in the disk section:
disk=[ 'file:/var/lib/xen/images/MAGRO1V/disk0,xvda,w'
       ,'phy:/dev/sr0,hdc:cdrom,r'
     ]

However, running 'xm create ...' runs into a 'kernel BUG':
...
[2.263729] xen-vbd: registered block device major 22
[2.264990] blkfront: hdc: barriers enabled
[2.266463] blk: request botched
[2.267402] ------------[ cut here ]------------

[2.267952] kernel BUG at/usr/src/packages/BUILD/kernel-xen-2.6.31.5/linux-2.6.31/block/blk-core.c:2216!

[2.267952] invalid opcode: 0000 [#1] SMP
[2.267952] last sysfs file:
[2.267952] Modules linked in: xenblk(+) cdrom
etc.etc.


Are you using a patched xen-kernel?
Wolf






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