Re: Trouble getting xbd devices to work

[John Nemeth <jnemeth%cue.bc.ca@localhost>]

On Aug 25, 12:39pm, Martin Husemann wrote:
} 
} I am trying to set a xen machine up and have some beginners trouble.
} I followed the howto quite cloesly and can fire up domUs now.
} 
} I have:
} 
} xentools48-4.8.3nb4
} xenkernel48-4.8.3
} 
} and NetBSD 8.99.24 (XEN3_DOM0) as dom0.
} 
} I tried two formats, one from the howto, another derived from the official
} xen config dokumentation. They look like this:
} 
} disk = [ '/dev/wd0f,raw,0x1,rw',
}          '/xen/NetBSD-8.0_STABLE-i386-install.img,,0x2,ro' ]
} 
} and
} 
} disk = [ 'phy:/dev/wd0g,0x1,w',
}          'file:/xen/NetBSD-8.0_STABLE-amd64-install.img,0x2,r' ]

     From one of my systems:

disk = [ 'phy:/dev/mapper/vg0-domu--access,0x1,w',
         'file:/usr/local/images/NetBSD-7-amd64-20160611.iso,0x2,r' ]

This works, so it would appear that you have the syntax correct.

} Both seem to work fine from the dom0's PoV:
} 
} [ 1956.2051930] xbd backend: attach device wd0f (size 209715200) for domain 1
} [ 1956.2951925] xbd backend: attach device vnd0d (size 2662400) for domain 1
} 
} and
} 
} [ 4270.3217421] xbd backend: attach device wd0g (size 209715200) for domain 3
} [ 4270.4517413] xbd backend: attach device vnd0d (size 2867200) for domain 3
} 
} Disklabel for wd0 shows:
} 
}  f: 209715200 1350570816     4.2BSD      0     0     0  # (Cyl. 1339852 - 1547902*)
}  g: 209715200 1560286016     4.2BSD      0     0     0  # (Cyl. 1547902*- 1755953*)
} 
} and the files are there:
} 
} -rw-r--r--  1 root  wheel  1468006400 Aug 23 00:19 /xen/NetBSD-8.0_STABLE-amd64-install.img
} -rw-r--r--  1 root  wheel  1363148800 Aug 23 02:20 /xen/NetBSD-8.0_STABLE-i386-install.img
} 
} But both domUs show:
} 
} [   2.0000246] xbd0d: error reading fsbn 0 (xbd0 bn 0; cn 0 tn 0 sn 0)
} [   2.0000246] xbd0: dos partition I/O error
} [   2.0200351] xbd1: dos partition I/O error
} [   2.0200351] xbd1d: error reading fsbn 0 (xbd1 bn 0; cn 0 tn 0 sn 0)
} 
} I suppose I am doing something stupid?

     Nothing is coming to mind, but make sure that the contents of
/usr/pkg/etc/xen/scripts is up to date.  It should been updated
when you installed xentools, but you may want to grab a new copy
from /usr/pkg/share/examples/xen/scripts.

}-- End of excerpt from Martin Husemann