Root disk failed in HP Unix ??? How to change the Root disk?

If the disk is hot swappable, remove the disk

1. # vgreduce -f /dev/vg00

This will remove the failed disk from vg00

2. # lvlnboot -R

3. Insert the new disk

4. # ioscan -fnC disk

5. # vgcfgrestore -n /dev/vg00 /dev/rdsk/

6. # mkboot /dev/rdsk/devicefile

7. # mkboot -a "hpux" /dev/rdsk/devicefile

8. # vgchange -a y /dev/vg00

9. # vgsync /dev/vg00

10. # lvlnboot -R

11. confirm with vgdisplay, lvdisplay, pvdisplay and lvlnboot.

=============================
If the disks are not hot swappable

1. Shutdown and get the disk replaced

2. boot in single-user mode

3. ioscan, find the device file

4. vgcfgrestore -n /dev/vg00 /dev/dsk/

5. mkboot /dev/rdsk/

6.mkboot -a "hpux" /dev/rdsk/

7.vgchange -a y /dev/vg00

8.vgsync /dev/vg00

9. Reboot in multi-user mode