Why does the installer exits with the message "Specified nonexistent disks mapper/mpath0 in partition command" while installing Red Hat Enterprise Linux 5.6 on an FC attached OPEN-V Lun ?

Issue

• Why does the message "Specified nonexistent disks mapper/mpath0 in partition command" come up while installing Red Hat Enterprise Linux 5.6 on an FC attached OPEN-V Lun ?

• The kickstart file is given below :

  install
  text
  network --device eth0 --bootproto dhcp --noipv6 --device=eth0
  url --url http://<IP-Address>/ks.cfg
  lang en_US
  keyboard sg
  clearpart --all --initlabel --drives=sda
  bootloader --location=mbr --driveorder=mapper/mpath0
  timezone Europe/Zurich
  auth --enablemd5 --enableshadow
  rootpw --iscrypted $1$q34E2d96$Veijg44rKciYXNlbbCrDt0
  firewall --enabled --ssh
  skipx
  key --skip
  ignoredisk --drives=cciss/c0d0,sdb,sdc,sdd,sde
  logging --level=debug
  
  #Disk partitioning information
  
  part /boot --fstype ext3 --size 256 --ondisk mapper/mpath0
  part pv.1 --size 0 --grow --ondisk mapper/mpath0
  
  #Logical Volume information
  
  volgroup rootvg --pesize=32768 pv.1
  logvol      /          --vgname=rootvg     --name=root          --size=24576      --fstype ext3 --grow
  logvol swap           --vgname=rootvg     --name=swap          --size=4096     --fstype swap