Groovy. I have tried BIOS 1014, 1016, 1018, 1021, 1023, and now I'm on 1024... All have the same Promise Delays that I can tell.
After thinking more, I think I will go ahead and swap out one of the SATA's for a PATA. It won't be hard, it will just take a while to re-build/re-format/re-Surface Scan & re-copy all of the data back over. I'll put the removed SATA HD into my other PC (a P4P800-E Dlx - like yours

), and just use my LAN to transfer files onto it for B/U.
I know what you mean with all of my drives! With 2 Opticals, 4 internal HD's, and the removeable HD drive bay, I do tax my PS pretty hard. I'm running a 465 Watt Enermax with a 33Amp 12v rail, and it hangs in there just fine (for now). My rig weighs a TON!!! I also added a small old Power Supply from a retired USB enclosure (a very small PS), and I mounted it on the rear of the case by the PCI card area. This powers all 3 of my case fans (the HSF fan is the only fan powered off the MoBo). This way, I can mess with my fans (hooking/un-hooking) w/o fear of freaking out my PC with a voltage spkie (and it also alleviates about 2 Amps of current draw off the main PS's 12v rail).
I'll indeed keep you posted on my progress, but I can already tell you adding the PATA HD to the Promise Controller should fix this issue. Just a matter of finding time. Maybe tomorrow at work - on the clock would be nice
Rock on
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Asus P4C800-E Dlx (1024) / P4 3.2E @ 4.01GHz / 2Gig Corsair DDR550 (@502MHz) @ 2.5-3-3-6/2t Dual Channel / XP-120 HSF
HD's: 2x WD Raptor 36Gig in RAID-0 on ICH5R (OS) / 2x Maxtor 300Gig 16MB HD's on PROMISE (DATA)
2x Plextor 740A 16X D-L DVD-RW / ATI 9800Pro 128MB / Dell 2000FP 20.1" LCD / OCZ Powerstream 520 / RME Multiface 38 Ch Audio