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

from [Hiroyuki Sato] [Permanent Link][Original]
To: Xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] [Q] VmError: Disk isn't accessible with tap2:tapdisk:vhd
From: Hiroyuki Sato <hiroysato@xxxxxxxxx>
Date: Thu, 4 Aug 2011 18:19:13 +0900
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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" ]
  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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