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zpool features

zpool-features.7

  • blake3 - This feature enables the use of the BLAKE3 hash algorithm for checksum and dedup
  • block_cloning - Block cloning allows to create multiple references to a single block. To use cp –reflink and other commands needing bclone support.
  • block_cloning_endian - This feature corrects ZAP entry endianness issues in the Block Reference Table (BRT) used by block cloning
  • dynamic_gang_header(*) - enables larger gang headers based on the sector size of the pool.
  • head_errlog - This feature enables the upgraded version of errlog, which required an on-disk error log format change.
  • physical_rewrite - This feature enables physical block rewriting that preserves logical birth times, avoiding unnecessary inclusion of rewritten blocks in incremental zfs send streams. Purpose: It is used to refresh data, potentially mitigating drive surface degradation (like oxidation) on older drives.
  • vdev_zaps_v2 - This feature creates a ZAP object for the root vdev.
  • zilsaxattr - This feature enables xattr=sa extended attribute logging in the ZIL