Pawel Jakub Dawidek writes:
> ZFS does exactly 3. What you are suggesting could be done by not loading
> geom_mirror.ko module and mounting file system read-only from one of the
> mirror components. [...]

Would it really be that hard for geom_mirror to translate enough of the
old metadata to access the mirror r/o, and only perform the upgrade on
explicit request?

Dag-Erling Smørgrav -
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