05-07-2019, 04:34 PM
I don't have my RockPro64, yet. (It's on its way!) I hope to do something similar. You should be able to put just the boot partition on the SD card, and then put your root partition on SATA drive. The best way to accomplish this may be to start with a complete Linux image on the SD card and boot up on it. Then setup the SATA drives as RAID1, create a partition, and copy the root partition files from the SD card over. Then configure your fstab to make the new partition root and update your bootloader configuration.
Note: The above is all speculation, and I haven't tried it!
But what I really want to do with my system is eliminate the SD card dependency entirely. I think this should be possible with u-boot, assuming u-boot has built-in support for SATA. Just flash u-boot the SPI and configure it to boot from SATA! Probably easier said than done! But it seems like it should be possible.
Note: The above is all speculation, and I haven't tried it!
But what I really want to do with my system is eliminate the SD card dependency entirely. I think this should be possible with u-boot, assuming u-boot has built-in support for SATA. Just flash u-boot the SPI and configure it to boot from SATA! Probably easier said than done! But it seems like it should be possible.