Igge

Good evening,
 
Is it possible to "re-use" the system on SATA ? And how would I do that.
 
I use a HC4 with SD card, a SSD and a HDD 
I flashed the SD card with Armbian_20.11.1_Odroidhc4_buster_current_5.9.12.img.xz
then used armbian-config to Boot from SD - system on SATA.  (sdb2)
also I installed PiHole, OMV ...
 
Due to an power failure the HC4 was not booting anymore.
With a newly flashed SD card its booting again, but of course its not using the system on sdb2 
When using armbian-config it would erase by sdb2 before 
Could I somehow use the system which still should be on sdb2 instead of starting from beginning?
 
thanks for your help
best Regards
Igge

Unfortunately this is not working, 
I changed the rootdev UUID from the current one of mmcblk1p1 to the one of my sdb2 in /boot/armbianEnv.txt using nano.
When I reboot, board is not booting at all now.
 
I will flash the SD card again.

Hi Nico,
thanks for your help. Sorry to answer only now, I needed to wait 24 hours to be able to write again.
 
What you describe is what I did 
blkid showed for /dev/mmcblk1p1: UUID="719e2259-339c-4a64-8012-cdd30ffc7dfc"
 
This UUID was the one mentioned in /boot/armbianEnv.txt
 
And I changed it to the UUID of /dev/sdb2: UUID="bd07f3d4-1caa-443d-b91a-07e4057b41f6"
 
didnt work