Maintenance mode boot(MMB) and recovery

hi,
i figured why i need to boot in MMB,some of which are missing or corrupt LABEL (LIF labeL ,i guess) on the boot disk.
To explicitly corrupt this entry i think a simple dd will work.
ok let me elaborate this issue:
i need to check this functionality.
so i have one LVM boot disk
and one VxVM boot disk.
now by giving "hpux -vm" at ISL prompt i'll be taken to MMB.
So my question is if i would have corrupted the LABEL of the bootdisk(LVM bootdisk) and have booted from the secondry media(i.e. VxVM bootdisk) then how can i recover(bring back the LABEL on the LVM bootdisk)from getting into MMB.

please reply soon.
thanks.