问重新启动后出现XenServer错误(xenopsd内部错误)

EN

Jan 24, 2014 10:03:29 AM Error: Starting VM 'CentOS 6 (64-bit)' - 
Internal error: xenopsd internal error: 
VM = 182361af-d10a-d97b-3a65-346d9cec1bcb; domid = 133; 
Bootloader.Bad_error Traceback (most recent call last):

File "/usr/bin/pygrub", line 895, in ?
    part_offs = get_partition_offsets(file)
  File "/usr/bin/pygrub", 
line 105, in get_partition_offsets
image_type = identify_disk_image(file)

File "/usr/bin/pygrub", line 49, in identify_disk_image

fd = os.open(file, os.O_RDONLY)

OSError: [Errno 2] No such file or directory: 
'/dev/sm/backend/94b422b6-3e31-88fb-bc55-99b33de9d89a/36bce863-ba6d-4792-b29d-dc6211bd5e8c'