If the ambient is 34 degrees there's no wonder fan speed is high! Fan speed is 13% when the ambient is 23 degrees, at 24 degrees I get 14% and at 25 degrees I get 15% - certainly seems to be 1% faster per degree at those sorts of temperatures but at the high ambient you are talking about it could easily be set to ramp up the speed by more than 1% per degree (very likely in fact). Even if you assume it will stick to 1% per degree that would give a minimum of 24% fan speed at that temperature.
My fan speeds were from a quick initial test with no HDDs fitted either, if you have hot 7200rpm or faster drives fitted you'll certainly be running even faster fan speeds to try and cool everything to acceptable temperatures.
I'd take a look at where you run the server (in an enclosed cupboard?) and what HDDs/add on cards etc etc you're using to work out why the server wants to run the fan so fast, once you've fixed the problem I expect fan speed will reduce. Have you upgraded the CPU to something with a TDP far too high for the server?
Using the 'cracked ilo' and completely voiding your warranty is your choice I guess but please don't go talking about it on HP's own forum, it gives a really bad impression that everyone is abusing their servers with software that artifically reduces fan speed to levels the server does not want them to run at, increases the chance that something will get damaged from heat - BUT more importantly it reduces the likelihood that HP will consider releasing more updates that tweak the fan speed curves to make it quieter if they think they're likely to end up with loads of dead machines sent back under warranty from people who've inappropriately used too low a fan speed. Yes HP do consider things like this and I don't want any further improvements to be cancelled for these reasons. There are plenty of other forums to discuss unsupported modifications on.
