Hi Raju,
I have been able to configure raid for all my partitions except /boot and /
After unmounting the above patitions if I try to mkraid than still it gives me error
saying that sda1(/boot) and sda10(/) is still mounted.
Now my /etc/raidtab file is as follows :
----------------------------------------------------
raiddev /dev/md0
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
persistent-superblock 1
chunk-size 4
device /dev/sda5
raid-disk 0
device /dev/sdb5
raid-disk 1
raiddev /dev/md1
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
persistent-superblock 1
chunk-size 4
device /dev/sda1
raid-disk 0
device /dev/sdb1
raid-disk 1
raiddev /dev/md2
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
persistent-superblock 1
chunk-size 4
device /dev/sda6
raid-disk 0
device /dev/sdb6
raid-disk 1
raiddev /dev/md3
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
persistent-superblock 1
chunk-size 4
device /dev/sda9
raid-disk 0
device /dev/sdb9
raid-disk 1
raiddev /dev/md4
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
persistent-superblock 1
chunk-size 4
device /dev/sda11
raid-disk 0
device /dev/sdb11
raid-disk 1
raiddev /dev/md5
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
persistent-superblock 1
chunk-size 4
device /dev/sda7
raid-disk 0
device /dev/sdb7
raid-disk 1
raiddev /dev/md6
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
persistent-superblock 1
chunk-size 4
device /dev/sda10
raid-disk 0
device /dev/sdb10
raid-disk 1
----------------------------------------------------
I am not mounting my sda1 ... 10 partitions. Instead I am mounting md0, md1 etc. For
this I have inserted the following in /etc/rc.d/rc.sysinit ( I have purposely changed
this in rc.sysinit rather than rc.local because otherwise since the /usr partition is
not mounted the Cron Daemon as well as http server give error. I have put the
following lines in rc.sysinit just before starting of the above daemons :
-------------------------------------------------
raidstart /dev/md0
raidstart /dev/md2
raidstart /dev/md3
raidstart /dev/md4
raidstart /dev/md5
mount /dev/md0 /home
mount /dev/md2 /usr
mount /dev/md3 /tmp
mount /dev/md4 /var
mount /dev/md5 /opt
-------------------------------------------------
The output of /proc/mdstat is as follows :
-----------------------------------------------
Personalities : [raid1]
read_ahead 1024 sectors
md5 : active raid1 sdb7[1] sda7[0] 1024896 blocks [2/2] [UU]
md4 : active raid1 sdb11[1] sda11[0] 154496 blocks [2/2] [UU]
md3 : active raid1 sdb9[1] sda9[0] 512896 blocks [2/2] [UU]
md2 : active raid1 sdb6[1] sda6[0] 2048896 blocks [2/2] [UU]
md0 : active raid1 sdb5[1] sda5[0] 4096896 blocks [2/2] [UU]
unused devices: <none>
-----------------------------------------------
The output of df -h is as follows :
----------------------------------------------
Filesystem Size Used Avail Use% Mounted on
/dev/sda10 485M 45M 415M 10% /
/dev/md0 3.8G 10M 3.6G 0% /home
/dev/md2 1.9G 626M 1.2G 33% /usr
/dev/md3 485M 658k 459M 0% /tmp
/dev/md4 146M 17M 121M 12% /var
/dev/md5 985M 20k 935M 0% /opt
/dev/sda1 25M 2.8M 21M 12% /boot
----------------------------------------------
What should be done to create raid devices for / ( root partition ) and /boot ( boot
partition ).
Thanks for the patience.
Regards
Rajesh
Raju Mathur saw fit to inform LI that:
>For the last time, you can EITHER mount the individual partitions
>which comprise the RAID device OR you can mount the RAID device. If
>md0 == sda5 and sdb5, you can EITHER mount /dev/sda5 OR /dev/md0. You
>are getting the error since you're mounting /dev/sda5 on /home and
>THEN trying to start /dev/md0. It will not work. It will never work.
>
>Regards,
>
>-- Raju
>
--
Rajesh(ALIAS Shriram) Fowkar
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