AlexVS

Yes.

Installed Arabian 21.08.3 Booster with Linux 5.10.63 + OMV5. Used as a NAS. Please excuse my English.

Installed a 6-port SATA card ASM1166 into the system. Currently, 4 HDD drives and 1 SSD drive are connected. All disks are 2.5". RAID1 is assembled on two disks. It works great. Please excuse my English.

Sata controller installed? I experienced a similar problem with the Marvell 88SE9230 controller, after replacing it with the Marvell 9235 everything works fine.

The problem was in the Marwell 9230 controller. If you replace this controller with a Marwell 9235, then everything works fine.

Downloaded the image file Armbian_20.08_Rockpro64_buster_current_5.7.15_desktop.img. Using the Etcher utility, I burned the image to the SD Card. Installed SD Card in RockPro64. The system does not start. The exact same problem is observed with Armbian_20.08_Rockpro64_focal_current_5.7.15_desktop.img. If I write the Armbian_20.05.2_Rockpro64_buster_current_5.4.43_desktop.img image to the SD Card, then the system starts and installs normally. Then I use apt update and apt upgrade, as a result, the system is updated to version 5.7.15. I am trying to transfer the system to a connected SSD, after which the system stops booting. PS Sorry for my English.