There are two methods for this. The preferable choice is to use the command "vxunroot". If you can't do this for some reason, or you need to repair a system that has crashed, you can manually un-encapsulate the disk using the following steps:
1) Boot off the cdrom # boot cdrom -sw 2) Mount the root file system. Your root slice could be different. # mount /dev/dsk/c0t0d0s0 /a 3) Edit /a/etc/system Using "*" comment out the lines between VXVM BEGIN and VXVM END NOTE: There might be a file /a/etc/system.prevm That could be used. The lines look like the following: *rootdev:/pseudo/vxio@0:0 *set vxio:vol_rootdev_is_volume=1 4) Edit /a/etc/vfstab Need to comment out the line that references the Volume Manager volumes. NOTE: There might be a file /a/etc/vfstab.prevm 4a) Using the information in the vfstab file change the root device to system root disk. ie. /dev/dsk/c0t0d0s0 /dev/rdsk/c0t0d0s0 / ufs 1 no - There are lines within the vfstab starting with "NOTE:" that indicates the original boot device. Use this information to recreate the original vfstab file. There are line similar to this: #NOTE: volume rootvol (/) encapsulated partition c0t0d0s0 4b) Do the same thing for the other encapsulated volumes (ie. /usr , /opt, ..etc) 5) Unmount /a, and reboot.