Disk /dev/md0 doesn't contain a valid partition table

Disk /dev/sdc: 500.1 GB, 500105740288 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1   *           1          14      104391   fd  Linux raid autodetect
Partition 1 does not end on cylinder boundary.
/dev/sdc2              14       38817   311686656+  fd  Linux raid autodetect
/dev/sdc3           38817       38914      779152+  fd  Linux raid autodetect