Hola amigos, sucede que tengo un servidor que trabaja bien con centos 5.1, pero ahora al querer volver a instalar el sistema me sale el siguiente error

1...2...3..4...5.. x server started successfully.

Starting graphical installation
traceback (most recent call last):
file "/usr/bin/anaconda", line 900, in ?
iutil.makeDriveDeviceNodes()
File "/usr/lib/anaconda/iutil.py", line 264, in makeDriveDeviceNodes
isys.makeDevInode(device, "/dev/%s" % (device,))
File "/usr/lib/anaconda/isys.py", line 422, in makeDevInode
_isys.mkdevinode(name, fn)
SystemError: (2, 'No such file or directory'
install exited abnormally [1/1]
sending termination signals...done
sending kill signals...done
disabling swap.....
unmounting filesystems...
/mnt/runtime done
disabling /dev/loop0
/proc/bus/usb done
/proc done
/dev/pts done
/sys done
/tmp/rmfs done
/selinux done
you may safely reboot your system

alguien sabe porque no puedo iniciar el programa de instalacion ?