root disk's disklabel deleted, can't restart.urgent!

[stephen peng]

i wanted to do a root disk backup,wroted down the root disk' disklabel using
#disklabel -r dsk0 > dsk0.tmp
and i accidently deleted the root disk's disklabel running
#disklabel -z dsk0
to restore the dsk0's disklabel, i run
#diskabel -R -r dsk0 dsk0.tmp RESTORE
then i reboot the machine, and it never come up again, showing following messages:
root partition must be the size of 8192
can't open osf_boot.

and the version of operation system is Tru64 UNIX 5.0

i need your help urgently!thanks.

[Michael Schulte zur Sur]

Hi,

disklabel needs -t advfs for boot disk.
The message root partition must be the size of 8192
is typical for forgetting that.

greetings,

Michael