[~] # df -h
Filesystem                Size      Used Available Use% Mounted on
/dev/ramdisk            139.5M    116.7M     22.8M  84% /
tmpfs                    32.0M    124.0k     31.9M   0% /tmp
/dev/sda4               310.0M    156.4M    153.5M  50% /mnt/ext
/dev/md9                509.5M     54.3M    455.1M  11% /mnt/HDA_ROOT
/dev/md0                  8.9T      7.7T      1.2T  86% /share/MD0_DATA
tmpfs                    32.0M         0     32.0M   0% /.eaccelerator.tmp
[~] # mdadm --detail /dev/md0
/dev/md0:
        Version : 00.90.03
  Creation Time : Wed Mar 17 16:47:10 2010
     Raid Level : raid6
     Array Size : 9759728000 (9307.60 GiB 9993.96 GB)
  Used Dev Size : 1951945600 (1861.52 GiB 1998.79 GB)
   Raid Devices : 7
  Total Devices : 8
Preferred Minor : 0
    Persistence : Superblock is persistent

  Intent Bitmap : Internal

    Update Time : Sun Jun 26 17:47:02 2011
          State : active
 Active Devices : 7
Working Devices : 8
 Failed Devices : 0
  Spare Devices : 1

     Chunk Size : 64K

           UUID : 0880a4c4:f8c11d3b:f0de0681:2f178bed
         Events : 0.2451168

    Number   Major   Minor   RaidDevice State
       0       8        3        0      active sync   /dev/sda3
       1       8       19        1      active sync   /dev/sdb3
       2       8       35        2      active sync   /dev/sdc3
       3       8       51        3      active sync   /dev/sdd3
       4       8       67        4      active sync   /dev/sde3
       5       8       83        5      active sync   /dev/sdf3
       6       8       99        6      active sync   /dev/sdg3

       7       8      115        -      spare   /dev/sdh3
[~] # cat /proc/mdstat
Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath]
md0 : active raid6 sda3[0] sdh3[7](S) sdg3[6] sdf3[5] sde3[4] sdd3[3] sdc3[2] sdb3[1]
      9759728000 blocks level 6, 64k chunk, algorithm 2 [7/7] [UUUUUUU]
      bitmap: 6/233 pages [24KB], 4096KB chunk

md8 : active raid1 sdh2[2](S) sdg2[3](S) sdf2[4](S) sde2[5](S) sdd2[6](S) sdc2[7](S) sdb2[1] sda2[0]
      530048 blocks [2/2] [UU]

md13 : active raid1 sda4[0] sdd4[7] sde4[6] sdf4[5] sdg4[4] sdh4[3] sdc4[2] sdb4[1]
      458880 blocks [8/8] [UUUUUUUU]
      bitmap: 0/57 pages [0KB], 4KB chunk

md9 : active raid1 sda1[0] sdh1[7] sdg1[6] sdf1[5] sde1[4] sdd1[3] sdc1[2] sdb1[1]
      530048 blocks [8/8] [UUUUUUUU]
      bitmap: 1/65 pages [4KB], 4KB chunk

unused devices: <none>
[~] #