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{{note box|You'll have to determine if your disk can be reinstated at the array. In fact sometimes a raid can get out of sync after a power failure but also some outages times for physical disk itself. It is necessary to test the hard drive if this occurs repeatedly. For this we will use '''smartctl'''.}}
 
{{note box|You'll have to determine if your disk can be reinstated at the array. In fact sometimes a raid can get out of sync after a power failure but also some outages times for physical disk itself. It is necessary to test the hard drive if this occurs repeatedly. For this we will use '''smartctl'''.}}
   −
smartctl -a /dev/sdb  # For all the details available by SMART on the disk
+
For all the details available by SMART on the disk
 +
 
 +
smartctl -a /dev/sdb
    
At least two types of tests are possible, short (~ 1 min) and long (~ 10 min to 90 min).
 
At least two types of tests are possible, short (~ 1 min) and long (~ 10 min to 90 min).
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  smartctl -l selftest /dev/sdb
 
  smartctl -l selftest /dev/sdb
    +
{{Note box|if you need to change the disk due to physical failure found by the smartctl command, install a new disk of the same capacity (or more) and enter the following commands to recreate new partitions by copying them from healthy disk sda.}}
 +
 +
sfdisk -d /dev/sda > sfdisk_sda.output
 +
sfdisk /dev/sdb < sfdisk_sda.output
    +
If you want to reintegrate the same disk without replacing it, go to the next step.
    
=== Add the partitions back ===
 
=== Add the partitions back ===
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=== Another Look at the mdstat ===
 
=== Another Look at the mdstat ===
   −
  [root@ ~]# '''cat /proc/mdstat'''
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  [root@sme8-64-dev ~]# cat /proc/mdstat
  Personalities : [raid1]
+
  Personalities : [raid1]  
md2 : active raid1 sdb2[2] sda2[0]
  −
      488279488 blocks [2/1] [U_]
  −
      [=>...................]  recovery =  6.3% (31179264/488279488) finish=91.3min speed=83358K/sec
   
  md1 : active raid1 sdb1[1] sda1[0]
 
  md1 : active raid1 sdb1[1] sda1[0]
 
       104320 blocks [2/2] [UU]
 
       104320 blocks [2/2] [UU]
 +
     
 +
md2 : active raid1 sdb2[2] sda2[0]
 +
      52323584 blocks [2/1] [U_]
 +
      [>....................]  recovery =  1.9% (1041600/52323584) finish=14.7min speed=57866K/sec
 
   
 
   
 
  unused devices: <none>
 
  unused devices: <none>

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