Issue

• The system is having mdraid device /dev/md0 configured in raid level0. This mdraid device uses two Fusion-io ioDrives viz. /dev/fioa and /dev/fiob, but after a reboot md0 is not assembled successfully and shows second fusion io device as removed:

  [root@host1 ~]# mdadm -D /dev/md0
  /dev/md0:
      Version : 1.2
    Creation Time : Sat Mar 22 12:36:30 2014
       Raid Level : raid0
     Raid Devices : 2
    Total Devices : 1
      Persistence : Superblock is persistent
  
      Update Time : Sat Mar 22 12:36:30 2014
        State : active, FAILED, Not Started
   Active Devices : 1
  Working Devices : 1
   Failed Devices : 0
    Spare Devices : 0
  
       Chunk Size : 512K
  
         Name : host1:0  (local to host host1)
         UUID : 2212f1a3:d81cb2f7:95ebw1be:f14b9191
       Events : 0
  
      Number   Major   Minor   RaidDevice State
         0     252        0        0      active sync   /dev/fioa
         1       0        0        1      removed                   <---