just run - system can be up (in fact, I suspect it needs to be).
make_tape_recovery -ai
(check man page, if switches should be in uppercase).
-a includes all filesystems in vg00 (man page explains this, there is a config file that denotes what -A will capture). We always use it and it always works.
-i makes it interactive, that way, when you boot off it it will stop and give you the option to chaange filesystem layout , without it you get the "10 secs to press a key message).