The iscsid.log to see if the network is up before the daemon. You will see an entry like:

WARNING: Unable to retrieve NetworkInterface in order to determine reachability of /

To resolve this, open a terminal and type the following (note, you will need to have done a "full" install of XtendSAN:)

/usr/local/libexec/xtendsancli setBootDelay 10

This will delay the XtendSAN initialization by 10 seconds, and you can adjust as needed.