Procedure to replace the VxVM disks on HP-Ux
There are several ways to remove the disk, but to make sure that rootdg is not affected by any action, I would recommend to remove the disk from rootdg first, by using
# vxdg -g rootdg rmdisk rootdg02
# vxdisk offline c4t8d0
# vxdisk list
c4t8d0 should have status "offline"
Now change the disk (physical HW). After adding the disk run
# vxdctl enable
# vxdisk list
if c4t8d0 is still "offline"
# vxdisk online c4t8d0
# vxdisk list
disk should be in status "online invalid" if not "vxconfigd -k -m enable"
Now you have to add the disk to rootdg again
# /etc/vx/bin/vxdisksetup -i c4t8d0
# vxdg -g rootdg addisk rootdg02=c4t8d0
There are several ways to remove the disk, but to make sure that rootdg is not affected by any action, I would recommend to remove the disk from rootdg first, by using
# vxdg -g rootdg rmdisk rootdg02
# vxdisk offline c4t8d0
# vxdisk list
c4t8d0 should have status "offline"
Now change the disk (physical HW). After adding the disk run
# vxdctl enable
# vxdisk list
if c4t8d0 is still "offline"
# vxdisk online c4t8d0
# vxdisk list
disk should be in status "online invalid" if not "vxconfigd -k -m enable"
Now you have to add the disk to rootdg again
# /etc/vx/bin/vxdisksetup -i c4t8d0
# vxdg -g rootdg addisk rootdg02=c4t8d0