MORE TEST RESULTS- I have been completely unsuccessful in creating a bootable external drive on a Thunderbolt drive
- I have been successful in creating a bootable external SSDs on two external drives with USB 3.1 gen 2 connections to Tunderbolt 3 ports
- I have been successful in creating a bootable external SSDs on two external drives with USB 3.1 gen 2 connections to USB 3.0 ports
- I have been successful in creating a bootable external SSDs on two external drives with USB 3.1 gen 2 connections to USB 3.1 gen 2 ports
- My Samsung Thunderbolt 3 SSD refuses to mount on any USB port
- I have not attempted to create a bootable drive on rotating rust (HD) media
- All attempts used a bootable flash drive installer created using these instructions from OS X Daily
CONCLUSIONS- With the right media and connection it is not difficult to create a bootable external drive for M1 macs given the right combination of connecting media, drive media, and installer
- Contrary to other reports I was completely unsuccessful using the Thunderbolt ports to create the drive
- The failure of the Samsung X5 SSD to mount is curious given Thunderbolt's compatibility with USB 2.0 through 4. I have to explore this further.
TBD- Will an external drive survive having a revised data volume cloned to it via CCC?
If we knew what it was we were doing, it wouldn't be called research, would it?
— Albert Einstein
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