Here's what I've done so far:
- plug in to a Mac Mini using a thunderbolt to firewire dongle
- turn it on
- after a few minutes the blue lights start flashing, and never stop
- the drive doesn't connect to the computer
- turned it off
- plugged it in to an iMac with thunderbolt (directly without any dongle)
- same result, blue lights flash, never connects
- found an article online that said to: turn off Pegasus and remove each drive, then turn it back on without the drives in it. But it just turns itself off immediately.
- downloaded and installed the Promise Utility for Mac
- the Promise Utility is running but doesn't do anything (presumably because the Pegasus isn't connected)
- downloaded and installed the Extension, and can confirm PromiseSTEX is installed
- tried to connect the Pegasus to the Mac Mini via firewire dongle again
- blue lights flashing, not connected
- left it on all night
- blue lights still flashing in the morning