利用LVM,可以解决,设两块硬盘分别为sdb、sdc(硬盘分区都删掉):
pvcreate /dev/sdb
pvcreate /dev/sdc
vgcreate -s 128m vghome /dev/sdb
vgextend vghome /dev/sdc
vgdisplay vghome #查看 Free PE,用于下面创建LV
lvcreate -l ??? -n lvhome vghome #???为上面的 Free PE
mkfs.ext4 /dev/vghome/lvhome
echo "/dev/vghome/lvhome /home ext4 defaults 0 0">>/etc/fstab
mount /home
df -h