HawaiianPi wrote: ↑
Fri May 25, 2018 7:01 pm
When USB booting I often leave an non-bootable SD card in the system for faster boot (eliminates the 5 second delay), and as others have suggested, it also eliminates the kworker issue. When booting from SD card I used to keep a USB flash drive in the system for backing up configuration files, scripts and such, and now the SD card is used for that when booting from my USB SSD.
Thanks for jumping in with that fast reply, I had noted that in the thread above, but was looking to completely eliminate the SD card and set up Raspbian to boot from one of those switch selectable read-only USB thumb drives, to create a totally bullet proof, just boot it up and it ALWAYS WORKS purpose built device that would not be subject to corruption issues.
If I add a blank SD card, and that card takes a power hit and becomes unreadable (not just Locked to read-only, but totally unreadable, returning an error, for the boot sector) would the Pi boot anyway, or just FREEZE?
I ask, because I have built such systems in the past based on SD cards, and every one of them had issues within a few months, despite using high quality known genuine SD cards. I have heard that Raspbian and the Pi have improved quite a bit in regard to SD reliability, and have personally found the high endurance SanDisk microSD cards to be fairly good - so I might end up doing something like you mentioned eventually, and using a microSD to create a writable "home" folder - but first I want to get the application working in a totally read-only environment without relying on an SD card.