What type of RAID is RAID-Z?

What type of RAID is RAID-Z?

• Hardware RAID
• Software RAID
• not a RAID
• Virtual RAID 

 

EXPLANATION

RAID-Z is a software raid achieved by

data/parity distribution scheme like RAID-5, but uses dynamic stripe width: every block is its own RAID stripe. It is primarily used by ZFS file system.
https://en.wikipedia.org/wiki/ZFS#RAID-Z

SOURCE

https://en.wikipedia.org/wiki/ZFS#RAID-Z