[Install Box86 on Arm64]

I followed your guide and installed it (looks successfuly - i only opened steam installer with it without finilizing instalation) on Nanopi M4 running Manjaro ARM and except of using -DRK3399 compile parameter and installing debian-archive-keyring via pacman it went smoothly
thank for this guide !

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[NanoPi M4V2 + SataHAT + OMV - pcie fail to train after reboot]

I also tried to go with mainline earlier this year but as you both mentioned stability issues get me back to legacy ;P i didn't have time to investigate that further, temporary fix is "do not reboot", in case of mainline kernel there is probably still an issue with it because there is still some reports here and there that are no older than 1-2months, and there is hardly any evidence of it resolved, except of various fix by locking clock speeds and changing governor's which in the and usually still ends with instabilities

v1 is more stable, so it even can be hardware level bug in case of v2... the issue persist from early days and there is still no clear resolution for this (i have v2 almost from first days of its availability) especially that rockpi with also ddr4 works without a hitch.

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[Rock Pi SATA Hat]

 

https://www.cnx-software.com/2019/12/08/rock-pi-sata-hat-targets-rock-pi-4-raspberry-pi-4-nas/

 

Nice hardware for NAS on usb3.0 only board.

It looks like perfect hardware for ultimate 12-bay RK3399 nas experience if combined with proper hardware

 

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[NanoPi M4 V2 - M4 Image not working]

I also received nanopi M4v2, and (after few attempts of course) succesfuly booted to armbian (rockpi 4b dev 5.3 from 02.11).
for now everything is working except of 2 things :

1. If you load armbian to eMMC and still leave sdcard in slot it will not boot at all (power usage is cycling around 1.9-2.1W and nothing is happening, even doing dd if=/dev/zero to sdcard didn't change anything), when i disconnect sdcard it's booting, and working great for now.

2.Probably more armbian-config issiue than board, but when i tried to install to mmc using btrfs it said that i have to little space on empty 32GB eMMC (there was somethig like :1008M required (blank space) memory available).
when i try ext4 it worked well and without any issiue.

let me know if i can do anything to help ;P

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[DIN rail PSU for SBC and HDD]

Mean Well has a specsheets on it site, there should be min/max ratings, you can compare it to ATX standard and have an idea about it's "grade".
I also used 5v 75w meanwell (i didn't remember for now which series, LRS or something like that) and it work good for OPi PC Plus + NanoPi M4 and NPi neo core2, i didn't have any issue with that.
Unfortunately for now I'm just use NPi M4 sata hat with 12V/2A power supply, so I can't tell how it will work in your case, but meanwell produce good power supplies so it should be fine.

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[Nanopi Neo 2]

Maybe you must install armbianmonitor (armbianmonitor -r if i remember it right) oraz just type armbianmonitor or armbianmonitor -h (it should display help)

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