BBB unexpected power loss

i want to use BBB in an application where unexpected power losses can happen.
Has someone implemented something like a “read only” file system where all file writes go to a ram file system ore something else.
When i compare the known “Knoppix” on X86 which will always boot with same data out of a read only DVD.
If my apps has to store some information over powerloss i can couple an eeprom on spi.