fdisk -l /dev/md0

Disk /dev/md0: 6000.9 GB, 6000916561920 bytes
2 heads, 4 sectors/track, 1465067520 cylinders, total 11720540160 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 524288 bytes / 1572864 bytes
Disk identifier: 0x00000000

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