[CentOS] Software RAID1 Disk I/O

John R Pierce pierce at hogranch.com
Tue Jan 5 22:50:26 UTC 2010


Matt wrote:
> Does anyone have an idea what I have wrong here?  This is my first
> software RAID install.  Built a number of Centos servers without RAID
> and they have all worked fine.
>   

wild guess, md is still striping.   try...


# mdadm -D /dev/md0   
/dev/md0:
        Version : 00.90.01
  Creation Time : Thu Dec 10 12:58:00 2009
     Raid Level : raid10
     Array Size : 286743936 (273.46 GiB 293.63 GB)
    Device Size : 143371968 (136.73 GiB 146.81 GB)
   Raid Devices : 4
  Total Devices : 4
Preferred Minor : 0
    Persistence : Superblock is persistent

    Update Time : Mon Dec 21 16:48:16 2009
          State : clean
 Active Devices : 4
Working Devices : 4
 Failed Devices : 0
  Spare Devices : 0

         Layout : near=2, far=1
     Chunk Size : 64K

           UUID : efd5289d:577a741b:16302cca:5b33303f
         Events : 0.237213

    Number   Major   Minor   RaidDevice State
       0       8       33        0      active sync   /dev/sdc1
       1       8       49        1      active sync   /dev/sdd1
       2       8       65        2      active sync   /dev/sde1
       3       8       81        3      active sync   /dev/sdf1




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