doesn't contain a valid partition table 请问如何解决？

[root@localhost ~]# fdisk -l

Disk /dev/sda: 37.4 GB, 37422097408 bytes
255 heads, 63 sectors/track, 4549 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xf183f183

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          25      200781   83  Linux
/dev/sda2              26        4549    36339030   8e  Linux LVM

Disk /dev/dm-0: 36.0 GB, 36071014400 bytes
255 heads, 63 sectors/track, 4385 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00000000

Disk /dev/dm-0 doesn't contain a valid partition table

Disk /dev/dm-1: 1073 MB, 1073741824 bytes
255 heads, 63 sectors/track, 130 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x30307800

Disk /dev/dm-1 doesn't contain a valid partition table

这是什么错误？看似没有影响什么，请问如何解决？
我是fc8的系统。