difference between autoboot, and autostart flags in the PDC, BCH menu:
From: http://docs.hp.com/en/A7137-96003/A7137-96003.pdf (rp3410 rp3440 operations guide)
When the autostart flag is off, autoboots will be interrupted if a configuration change occurs
which causes reduced performance; thus requiring you to intervene prior to booting to the
internal system loader (ISL).
The auto boot will halt at the BCH prompt and you may continue booting by entering boot.