How is OSTree designed to be safe from power loss damage?

Hello all,

I understand how OSTree, at the end of it's deploy does an atomic switch in the "ostree admin" case of deployment of say a Linux OS. It assumes the softlink change is atomic on the filesystem (fair enough for me).

However, how does OSTree recover from a situation where power loss occured during a pull or deployment? I would assume some files are then missing and some files are damaged (or incomplete).

The next time the system boots, how does OSTree verify that no files were corrupted by the underlying filesystem and how does it bring a next pull or deployment into a valid state?



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