wolf7250

Did you buy the sata power cable from pine also? It splits the power into 2 sata cables and on both mount a splitter. Or you can like you say just split one cable to 4 with a sata splitter. I do power my rockpro64 with 4hdd in that way with a 12v 10a psu. It works like charm, no problem (but 8A is enough).

@wolf7250 - Just so you know, if you plan to use that NAS case from pine. In that case there is only room for 2x 3.5" and 2x 2.5". But back to your question, i have found a universal PSU from 7.5volt to 22.5volt and 10amp, so i did just use that one. 

Use 12V always to ROCKPRO64, and around (8A on the safe side) or so to power it all.

Yes, "0" off and "255" full speed. You can change anything inbetween.
 
I have 4 disk in the nas case, the 80mm noctua i did have installed before it was enough to cool it down, CPU temp around 40degress.  The orginal 80mm fan that "belongs" to the case is only around 10mm in thickness, and the noctua is 25mm. So to fit in the small space 90degree sata power cables is a very great idea. But you can fit normal sata power cables with some "violence" ;-)
 
 
No, I like always on, so i did find a number to fit my demands. But many fan scripts is avaible, but you have to fit it the fan controller (FAN name)
 
Just cut the cables and fit the plus and minus wire to the same cables at the fan. Very easy. Hope it was a little help, just ask again if there is something i can help with. Thanks.
The reason i did fit a 92mm noctua in the case was to get it silent, nothing else.

With new kernels the fan spins at "255" always, you can find the fan with this command 
sudo find /sys -name pwm1 | grep hwmon and then change the output to your setup - But on the new kernels the fan point can jump, i am not sure of what reason.

From my feel most of those are crap anyways and provide some weird/useles soft-raid solutions which can be realised via mdadm as well or even rely on that...

I have tested the Ziti... card for 1 week now, and runs very nice. So go for it, works right out of the box with new kernel also.

Also you can (as always) download the current versions directly from armbian.
 
https://www.armbian.com/helios4/
 
https://dl.armbian.com/helios4/

@wolf7250 - That card from pine64 should be avoided in my opinion, i did only have trubles with it.  I have only cards with Marvell chipset, and i found out buy a simple card not a fancy raid card - less problems. I can later today find my different cards and name them for you.

In my opinion it is a fine board, I run my ROCKPRO64 as a NAS. Runs 24/7 - wirh a sata card and 4 harddrivers in the nas case. OMV works fine, but there can be some probs with sata cards. 

I run krenel 5.7.13 focal, no problems what so ever. And it runs very stable.

It has been just a few days since release so they probably did not update their wiki yet.
 
https://www.armbian.com/newsflash/armbian-20-05-kagu/

@wolf7250,
 
I split your topic off into it's own post, as setting up an email server is more of a general software question than one pertaining to Helios4, specifically.
 
I personally do not use the armbian-config tool, but I rather doubt it installs a full mail server (I could be wrong)?