Re: [Xen-users] [Q] VmError: Disk isn't accessible with tap2:tapdisk:vhd

[Todd Deshane <todd.deshane@xxxxxxx>]

On Thu, Aug 4, 2011 at 5:19 AM, Hiroyuki Sato <hiroysato@xxxxxxxxx> wrote:
> I'm newbie Xen-4.1.1
>
> I'm trying to boot DomU with the following configuration.
> Sometime DomU boot, but sometime boot failed
>
> I'm not sure what is the problem.
>
> I can attach that image with tap-ctl on Dom0.
>
> Does anybody advice me about this problem??
>
> Sincerely
>
> * Environment
>
>  OS : Scientific Linux 6.1 x86_64
>  Kernel : 2.6.32.43
>      git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git
>  Xen : 4.1.1
>
>
> * Error
>
> #
> # tap2:tapdisk:vhd
> #
>
>  /usr/sbin/xm create xentest2 -c
>  Using config file "./xentest2".
>  Error: Disk isn't accessible
>
>
>  cat xentest2
>  name    = "test"
>  maxmem  = 512
>  memory  = 512
>  vcpus   = 1
>  bootloader = "/usr/bin/pygrub"
>  on_poweroff = "destroy"
>  on_reboot = "restart"
>  on_crash = "restart"
>  disk = [ "tap2:tapdisk:vhd:/tmp/tkoan.22561/test.vnd,xvda,w" ]

Could it be that the disk specification is incorrect?
http://xen.markmail.org/search/?q=vhd%20tap#query:vhd%20tap+page:1+mid:qzorvzxlpchikvf6+state:results


>  vif = [ "mac=00:16:3e:10:e8:01,bridge=virbr0,script=vif-bridge" ]
>
>
>  # tap-ctl allocate
>  /dev/xen/blktap-2/tapdev0
>  # tap-ctl spawn
>  tapdisk spawned with pid 2004
>  # tap-ctl attach -p 2004 -m 0
>  # tap-ctl open -p 2004 -m 0 -a vhd:/tmp/tkoan.22561/test.vnd
>  # tap-ctl list
>      2004  0    0        vhd /tmp/tkoan.22561/test.vnd
>  # sfdisk /dev/xen/blktap-2/
>  blktap0  control  tapdev0
>  # sfdisk -d /dev/xen/blktap-2/tapdev0
>  # partition table of /dev/xen/blktap-2/tapdev0
>  unit: sectors
>
>  /dev/xen/blktap-2/tapdev0p1 : start=     2048, size=   204800, Id=83, 
> bootable
>  /dev/xen/blktap-2/tapdev0p2 : start=   206848, size=  2097152, Id=82
>  /dev/xen/blktap-2/tapdev0p3 : start=  2304000, size= 18667520, Id=83
>  /dev/xen/blktap-2/tapdev0p4 : start=        0, size=        0, Id= 0
>
> * log
>
> [2011-08-04 17:49:39 1676] DEBUG (XendDomainInfo:103)
> XendDomainInfo.create(['vm', ['name', 'test'], ['memory', 512],
> ['maxmem', 512], ['on_poweroff', 'destroy'], ['on_reboot', 'restart'],
> ['on_crash', 'restart'], ['on_xend_start', 'ignore'], ['on_xend_stop',
> 'ignore'], ['vcpus', 1], ['oos', 1], ['bootloader',
> '/usr/bin/pygrub'], ['bootloader_args', ''], ['image', ['linux',
> ['videoram', 4], ['tsc_mode', 0], ['nomigrate', 0]]], ['s3_integrity',
> 1], ['device', ['tap2', ['uname',
> 'tap2:tapdisk:vhd:/tmp/tkoan.22561/test.vnd'], ['dev', 'xvda'],
> ['mode', 'w']]], ['device', ['vif', ['bridge', 'virbr0'], ['mac',
> '00:16:3e:10:e8:01'], ['script', 'vif-bridge']]]])
> [2011-08-04 17:49:39 1676] DEBUG (XendDomainInfo:2498)
> XendDomainInfo.constructDomain
> [2011-08-04 17:49:39 1676] DEBUG (balloon:187) Balloon: 884828 KiB
> free; need 16384; done.
> [2011-08-04 17:49:39 1676] DEBUG (XendDomain:476) Adding Domain: 1
> [2011-08-04 17:49:39 1676] DEBUG (XendDomainInfo:2836)
> XendDomainInfo.initDomain: 1 256
> [2011-08-04 17:49:39 1676] INFO (XendDomainInfo:3270) Mounting
> /tmp/tkoan.22561/test.vnd on /dev/xvdp.
> [2011-08-04 17:49:40 1676] DEBUG (DevController:95) DevController:
> writing {'backend-id': '0', 'virtual-device': '51952', 'device-type':
> 'disk', 'state': '1', 'backend':
> '/local/domain/0/backend/vbd/0/51952'} to
> /local/domain/0/device/vbd/51952.
> [2011-08-04 17:49:40 1676] DEBUG (DevController:97) DevController:
> writing {'domain': 'Domain-0', 'frontend':
> '/local/domain/0/device/vbd/51952', 'uuid':
> '85d3a006-d760-4eec-7a03-f7b05097e1c8', 'bootable': '0', 'dev':
> '/dev/xvdp', 'state': '1', 'params': '/dev/xen/blktap-2/tapdev0',
> 'mode': 'r', 'online': '1', 'frontend-id': '0', 'type': 'phy',
> 'tapdisk-params': 'tapdisk:vhd:/tmp/tkoan.22561/test.vnd'} to
> /local/domain/0/backend/vbd/0/51952.
> [2011-08-04 17:49:40 1676] DEBUG (DevController:144) Waiting for 51952.
> [2011-08-04 17:49:40 1676] DEBUG (DevController:628)
> hotplugStatusCallback
> /local/domain/0/backend/vbd/0/51952/hotplug-status.
> [2011-08-04 17:49:40 1676] DEBUG (DevController:628)
> hotplugStatusCallback
> /local/domain/0/backend/vbd/0/51952/hotplug-status.
> [2011-08-04 17:49:40 1676] DEBUG (DevController:642) hotplugStatusCallback 1.
> [2011-08-04 17:49:40 1676] DEBUG (DevController:144) Waiting for 51952.
> [2011-08-04 17:49:41 1676] DEBUG (DevController:628)
> hotplugStatusCallback
> /local/domain/0/backend/vbd/0/51952/hotplug-status.
> [2011-08-04 17:49:41 1676] DEBUG (DevController:642) hotplugStatusCallback 1.
> [2011-08-04 17:49:41 1676] ERROR (XendBootloader:43) Disk isn't accessible
> [2011-08-04 17:49:41 1676] INFO (XendDomainInfo:3289) Unmounting
> /dev/xvdp from /dev/xvdp.
> [2011-08-04 17:49:41 1676] DEBUG (XendDomainInfo:1276)
> XendDomainInfo.destroyDevice: deviceClass = tap2, device = /dev/xvdp
> [2011-08-04 17:49:41 1676] DEBUG (DevController:649)
> deviceDestroyCallback
> /local/domain/0/backend/vbd/0/51952/hotplug-status.
> [2011-08-04 17:49:41 1676] DEBUG (DevController:649)
> deviceDestroyCallback
> /local/domain/0/backend/vbd/0/51952/hotplug-status.
> [2011-08-04 17:49:41 1676] ERROR (XendDomainInfo:488) VM start failed
> Traceback (most recent call last):
>  File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py",
> line 474, in start
>    XendTask.log_progress(31, 60, self._initDomain)
>  File "/usr/lib64/python2.6/site-packages/xen/xend/XendTask.py", line
> 209, in log_progress
>    retval = func(*args, **kwds)
>  File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py",
> line 2838, in _initDomain
>    self._configureBootloader()
>  File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py",
> line 3285, in _configureBootloader
>    bootloader_args, kernel, ramdisk, args)
>  File "/usr/lib64/python2.6/site-packages/xen/xend/XendBootloader.py",
> line 44, in bootloader
>    raise VmError(msg)
> VmError: Disk isn't accessible
> [2011-08-04 17:49:41 1676] DEBUG (XendDomainInfo:3071)
> XendDomainInfo.destroy: domid=1
> [2011-08-04 17:49:41 1676] DEBUG (DevController:658) deviceDestroyCallback 6.
> [2011-08-04 17:49:41 1676] DEBUG (XendDomainInfo:2406) No device model
> [2011-08-04 17:49:41 1676] DEBUG (XendDomainInfo:2408) Releasing devices
> [2011-08-04 17:49:41 1676] ERROR (XendDomainInfo:108) Domain construction 
> failed
> Traceback (most recent call last):
>  File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py",
> line 106, in create
>    vm.start()
>  File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py",
> line 474, in start
>    XendTask.log_progress(31, 60, self._initDomain)
>  File "/usr/lib64/python2.6/site-packages/xen/xend/XendTask.py", line
> 209, in log_progress
>    retval = func(*args, **kwds)
>  File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py",
> line 2838, in _initDomain
>    self._configureBootloader()
>  File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py",
> line 3285, in _configureBootloader
>    bootloader_args, kernel, ramdisk, args)
>  File "/usr/lib64/python2.6/site-packages/xen/xend/XendBootloader.py",
> line 44, in bootloader
>    raise VmError(msg)
> VmError: Disk isn't accessible
>
>
> --
> Hiroyuki Sato
>
> _______________________________________________
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> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users
>



-- 
Todd Deshane
http://www.linkedin.com/in/deshantm
http://www.xen.org/products/cloudxen.html
http://runningxen.com/

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