cat /proc/partitions
major minor  #blocks  name

   8        0  244198584 sda
   8        1      60147 sda1
   8        2    7815168 sda2
   8        3   24346507 sda3
   8        4  211971304 sda4
   8        7       4096 sda7
   8       16   78150744 sdb
   8       32  156290904 sdc
   8       48  976762584 sdd
   8       49       4096 sdd1
   8       50    1572864 sdd2
   8       51  975183872 sdd3
   9        0  446409216 md0
 253        0  975181824 dm-0
cat /proc/mdstat
Personalities : [raid0] [multipath]
md0 : active raid0 sdc[2] sdb[1] sda4[0]
      446409216 blocks super 1.2 512k chunks

unused devices: <none>
df -h |grep home
/dev/md0            426G          48G  374G           12% /home