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Oracle® ZFS Storage Appliance Customer Service Manual
For ZS3-x, 7x20 Controllers, and DE2-24, Sun Disk Shelves
This update provides the ability to use the triple-parity RAID storage profile, RAID-Z with three parity sectors per stripe. Triple-parity offers increased protection against drive failures and additional overall availability.
In order to use this new mode, the storage pool must be upgraded. If you choose not to upgrade the pool and attempt to use this new property, you will get an error indicating that the storage pool needs to be upgraded first. There is no other implication of applying this update, and it can be ignored if there is no need to use this new setting. Applying this update is equivalent to upgrading the on-disk ZFS pool to version 17.