Arm64 Installation: Define offset

[dennisN86]

I'm trying to install OpenBSD on a NanoPi R2S, but I'm having difficulties to define the correct block sizes for the dd to command to write the .img file into the correct spot.

The OpenBSD manual at https://ftp.openbsd.org/pub/OpenBSD/.../INSTALL.arm64 lists the following two steps:

For systems based on Rockchip RK33xx SoCs:

 	dd if=/usr/local/share/u-boot/board/idbloader.img \
 	    of=/dev/sdXc seek=64
 	dd if=/usr/local/share/u-boot/board/u-boot.itb \
 	    of=/dev/sdXc seek=16384

Someone uploaded this little asciinema of a fresh OpenBSD install on the same board https://asciinema.org/a/381973

The ascii shows a third command of copying some other .bin file

sudo dd if=usr/lib/linux-u-boot-current-nanopi-r2s_20.11.3_arm64/trust.bin of=/dev/sdc seek=24576 conv=notrunc

Since releases differ in size, I need to know how to calculate this offset for the current trust.bin given the miniroot70.img

Help is greatly appreciated

[dennisN86]

Sorry for posting it to the wrong forum. Anyone able to help me with this issue?

[jggimi]

Originally Posted by dennisN86

Sorry for posting it to the wrong forum.

This is a small community of OpenBSD users and you've asked a very architecture-specific question for which this community lacks specific experience.

Anyone able to help me with this issue?

Try either the misc@ or arm@ OpenBSD mailing lists.