OK figured out what was going on with the 4500 and UPS.
If I set the 4500 to shutdown and NOT auto startup it goes off when low battery is reached. Everything worked liked it was suppose too.
I went in to the BIOS to check settings on the 4500. The unit has an option for reboot on power failure. It was set to reboot.
So I set the 4500 to reboot on power failure, a admin setting in the 4500/UPS setup.
I then set the UPS to shutdown at 2 min left with a 90 sec delay.
End shutdown at 15% with a 60 sec delay.
Note : I added a extra PC to the UPS load to speed up the time required for events to happen.
1. When the UPS reached the 2 min low battery mark the 4500 went in to shutdown mode, but did not power completely down, as before. Blower on high with the System LED blinking 3 times rapidly, indicates shutdown.
2. The UPS continued on remaining power (UPS battery LED blinking) with the 4500 (and PC) still on till the battery was exhausted and turned OFF. This took about 10 min before the outlets on the UPS went dead.
3. I then turned the power back on after a 5 min wait.
4. The battery charged till it reached the end shutdown level (15%), 20 min. Then power was applied to the outlets.
5. All equipment came back to life, including the 4500.
6. All my network equipment, router, switch, NIM was booted in 1 min.
7. At 5 min the 4500 was fully booted and reported NO Errors, RAID5 array clean.
Every thing is working as designed. :
It would have saved a lot of trouble if the Admin manual would have said the 4500 would be on till power loss. Or explained the sequence of events. But like most manuals they are written by people that knows what will happen. And never follow there instructions they have wrote. If they did the manual would be twice it's size. But then they would loose Phone support revenue.