gentoo grub-1.99_rc1 # sgdisk -p /dev/sdb
Disk /dev/sdb: 16777216 sectors, 8.0 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): EEA5F222-1B6F-4845-BA9F-E8841E2E4D2B
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 16777182
Partitions will be aligned on 2048-sector boundaries
Total free space is 9196 sectors (4.5 MiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1            2048            4095   1024.0 KiB  EF02  BIOS Boot Partition
   2            4096        16770000   8.0 GiB     FD00  RAID
gentoo grub-1.99_rc1 #

gentoo grub-1.99_rc1 # cat /proc/mdstat
Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4]
md0 : active raid1 sdb2[0]
      8381916 blocks super 1.2 [2/1] [U_]
      bitmap: 1/1 pages [4KB], 65536KB chunk

unused devices: <none>
gentoo grub-1.99_rc1 #