You might try adding "_netdev" to the options in fstab e.g:
/dev/emcpowera1 /myfilesystem ext3 defaults,_netdev 1 3
From the man page:
The filesystem resides on a device that requires network
access (used to prevent the system from attempting to
mount these filesystems until the network has been
enabled on the system).
We do this on some of our SAN attached storage to insure our SAN stuff has started properly before trying the mounts.
Alternatively you might look in /etc/rc?.d/* to see what the name of the init script is as the numeric component determines order. That is to say S01<script> would run first and S99<script> would run last. Numbers in between run in numerical order. For multiple scripts with same numeric component they run in alphabetical order (e.g. S07ralph would run after S07bob but before S07tom).