There are no mentions of new zpool features in the 11.2 release notes. A zpool that reported no issues until 11.1p11, now reports: $ zpool status pool: sys state: ONLINE status: Some supported features are not enabled on the pool. The pool can still be used, but some features are unavailable. action: Enable all features using 'zpool upgrade'. Once this is done, the pool may no longer be accessible by software that does not support the features. See zpool-features(7) for details. [...] $ zpool upgrade This system supports ZFS pool feature flags. All pools are formatted using feature flags. Some supported features are not enabled on the following pools. Once a feature is enabled the pool may become incompatible with software that does not support the feature. See zpool-features(7) for details. POOL FEATURE --------------- sys sha512 skein device_removal obsolete_counts zpool_checkpoint Some mention of these new features should have been made in the release notes. I suppose the correct course of action is to add them to the release errata.
I might be wrong, maybe only the following are new: POOL FEATURE --------------- sys device_removal obsolete_counts zpool_checkpoint
Also missing - the changes specifically relating to the "zpool remove" functionality. There are significant differences in the 11.1-RELEASE zpool man page (zpool remove portion) vs. the 11.2-RELEASE man page.