[root@ns1 /]# fdisk /dev/sda WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted. Command (m for help): p Disk /dev/sda: 80.0 GB, 80025280000 bytes 255 heads, 63 sectors/track, 9729 cylinders, total 156299375 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sda1 1 156299374 78149687 ee GPT Command (m for help): q [root@ns1 /]# fdisk /dev/sdb WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted. Command (m for help): p Disk /dev/sdb: 40.0 GB, 40020664320 bytes 255 heads, 63 sectors/track, 4865 cylinders, total 78165360 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sdb1 1 78165359 39082679+ ee GPT Command (m for help): q [root@ns1 /]# free total used free shared buffers cached Mem: 753860 478272 275588 0 16084 422040 -/+ buffers/cache: 40148 713712 Swap: 2047992 0 2047992 [root@ns1 /]# df Filesystem 1K-blocks Used Available Use% Mounted on rootfs 30237584 980060 27721528 4% / /dev/root 30237584 980060 27721528 4% / /dev 376928 172 376756 1% /dev none 376928 0 376928 0% /dev/shm [root@ns1 /]# cat /proc/mdstat Personalities : [raid1] md0 : active raid1 sda1[0] sdb1[1] 30719936 blocks [2/2] [UU] [======>..............] resync = 32.5% (9987904/30719936) finish=21.1min speed=16315K/sec unused devices: [root@ns1 /]#