Re: [cobalt-users] Raq4i or Raq4r

[Gerald Waugh <gwaugh@xxxxxxxxxxxxxxxxxxxxxxx>]

On Thursday 04 July 2002 01:02 pm, Gerald Waugh wrote:

Changed md0 to md1
another cobaltism
# mkraid -f /dev/md1
# raidstop /dev/md1
added contents of /etc/fstab from a RaQ4r, when you ared done,
check /etc/fstab
[root /root]# cat /etc/fstab
/dev/md1  /             ext2    defaults                  1 1
/dev/md6  swap      swap    defaults                 0 0
/dev/md3  /var        ext2    defaults,nosuid        2 2
/dev/md4  /home     ext2    defaults,usrquota,grpquota,grpid  3 3
none        /proc       proc    defaults                 0 0
none        /dev/pts  devpts  gid=5,mode=0622   0 0

> These instrucitons have never been used on a RaQ and there is no guarantee
> that they will not render your system useless, particularly if you err.
> Then you will have to run the OSRCD..
>
> 1) Is your second drive hdc (a master)?
>     if not strap it as a master to make it hdc
>
> 2) make a file /etc/raidtab (paste following data into it)
>
> raiddev           /dev/md1
> raid-level        1
> nr-raid-disks     2
> nr-spare-disks    0
> chunk-size        4
> device            /dev/hda1
> raid-disk         0
> device            /dev/hdc1
> raid-disk         1
>
> raiddev           /dev/md3
> raid-level        1
> nr-raid-disks     2
> nr-spare-disks    0
> chunk-size        4
> device            /dev/hda3
> raid-disk         0
> device            /dev/hdc3
> raid-disk         1
>
> raiddev           /dev/md4
> raid-level        1
> nr-raid-disks     2
> nr-spare-disks    0
> chunk-size        4
> device            /dev/hda4
> raid-disk         0
> device            /dev/hdc4
> raid-disk         1
>
> raiddev           /dev/md6
> raid-level        1
> nr-raid-disks     2
> nr-spare-disks    0
> chunk-size        4
> device            /dev/hda6
> raid-disk         0
> device            /dev/hdc6
> raid-disk         1
>
> 3) run the following commands
>     they will initilize hdc
>     As you run each command look at /proc/mdstat file. It should tell you
>     that the /dev/mdX device has been started, that the mirror is being
>     reconstructed, and an ETA of the completion of the reconstruction.
> # mkraid -f /dev/md1
> # mkraid -f /dev/md3
> # mkraid -f /dev/md4
> # mkraid -f /dev/md6
>
> 4) vi /etc/rc.d/rc.sysinit
>     find (if not there) add this section or remove the
>     section that is there and add this secion
> # Add raid devices
> if [ -f /proc/mdstat -a -f /etc/raidtab -a -x /etc/rc.d/rc.raid ]; then
>         echo "Starting up RAID devices..."
>         echo
>         . /etc/rc.d/rc.raid
>         echo
>         echo
>
>         # A non-zero return means there were problems.
>         if [ $? -gt 0 ]; then
>                 echo
>                 echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
>                 echo "!!                                       !!"
>                 echo "!! An error occurred during RAID startup !!"
>                 echo "!!                                       !!"
>                 echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
>                 echo
>
>                 LINE1=`getmsg raid_fail_1`
>                 LINE2=`getmsg raid_fail_2`
>                 $LCD_STOP >& /dev/null
>                 $LCD_SWRITE -s "$LINE1" "$LINE2" &>/dev/null &
>                 sleep 10
>
>                 echo
>                 echo "Automatic reboot in progress..."
>                 echo "Unmounting file systems"
>                 echo
>                 LINE1=`getmsg reboot_1`
>                 LINE2=`getmsg reboot_2`
>                 $LCD_STOP >& /dev/null
>                 $LCD_SWRITE -s "$LINE1" "$LINE2" &>/dev/null &
>                 sleep 2
>
>                 umount -a
>                 mount -n -o remount,ro /
>                 reboot
>         fi
>         # reset lcd message
>         LINE1=`getmsg checking_disk_1`
>         $LCD_STOP >& /dev/null
>         $LCD_SWRITE -s "$LINE1" "" &>/dev/null &
> fi
>
> 5) The partition-types of the devices used in the RAID must be set to
>     0xFD(use fdisk and set the type to ``fd'')
> # raidstop /dev/md1
> # raidstop /dev/md3
> # raidstop /dev/md4
> # raidstop /dev/md6
> # fdisk /dev/hda
> Command (m for help): p
> look at the partitions, with id 83
> you must change those to "fd" (no "")
> Use the 't' command to change the id
> Now do the same thing with hdc
> #fdisk /dev/hdc
>
> OK, you're done, reboot and then
> cat /etc/mdstat and you should see raid runing
>
> BE CAREFUL

[root /root]# cat /etc/fstab
/dev/md1  /             ext2    defaults                  1 1
/dev/md6  swap      swap    defaults                 0 0
/dev/md3  /var        ext2    defaults,nosuid        2 2
/dev/md4  /home     ext2    defaults,usrquota,grpquota,grpid  3 3
none        /proc       proc    defaults                 0 0
none        /dev/pts  devpts  gid=5,mode=0622   0 0

-- 
Gerald Waugh 
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