weird errors on boot

[pfeerick]

did that.  That's what the EDIT was about.

Wasn't sure which version you had actually tried as you said you'd tried a 32bit build but didn't say which one (i.e. 0.5.15 OMV armhf or the one I linked earlier) 

So, we have ascertained so far that you:

• are powering a rock64 using the official power supply using the barrel connector, so shouldn't be suffering from undervoltage/underpowering issues
  
• are getting sector errors when you use the eMMC to boot, but not SD boot, when writing the _same_ image to both the SD card and eMMC (using a USB-eMMC adapter) using etcher on Mac and are not getting verification errors, and are using a version of Etcher newer than 1.2.1 to ensure the false verification bug isn't present
  
• have also tried the SD to eMMC image, and on the second attempt it was successful (it failed the first time), but it behaved no differently to writing the image directly to the eMMC via etcher
  
• have tried both the pre-release 0.6.25 64 bit build and the armhf 0.5.15 builds on the eMMC and still get the same sector error images
  
• are having issues with re-detecting USB devices when you do boot the when you do boot from the SD card
  

Is all of this correct? The details are important, as if anything is wrong here I/we don't have a correct baseline to work from in identifying what the issue here is. 

Can you provide the log messages of these 'sector errors'? Also, the 're-detecting' messages? Perhaps also a full boot log, in order to actually see what is going on? probably using a pastebin service like https://paste.ubuntu.com/ as they'll probably be longer than the forum message limit.