https://community.netapp.com/t5/EF-E-Series-SANtricity-and-Related-Plug-ins/What-is-the-extra-Q-calculation-and-uses-for-whic-raid-level/m-p/139784#M553 <P>The RAID level is RAID 6. RAID 6 uses two parity drives which allows the RAID group to survive two drive failures. With only one parity drive (P) we have RAID 5. When there are two parity drives (P +Q) we have RAID 6. Info on how RAID 6 works is widely available on the internet.</P> Tue, 24 Apr 2018 13:20:13 GMT MitchBlackburn 2018-04-24T13:20:13Z https://community.netapp.com/t5/EF-E-Series-SANtricity-and-Related-Plug-ins/What-is-the-extra-Q-calculation-and-uses-for-whic-raid-level/m-p/139781#M552 <P>What is the extra Q calculation and uses for whic raid level ?&nbsp; Thanks in advance.&nbsp;</P> Wed, 04 Jun 2025 13:47:14 GMT https://community.netapp.com/t5/EF-E-Series-SANtricity-and-Related-Plug-ins/What-is-the-extra-Q-calculation-and-uses-for-whic-raid-level/m-p/139781#M552 UgurD 2025-06-04T13:47:14Z https://community.netapp.com/t5/EF-E-Series-SANtricity-and-Related-Plug-ins/What-is-the-extra-Q-calculation-and-uses-for-whic-raid-level/m-p/139784#M553 <P>The RAID level is RAID 6. RAID 6 uses two parity drives which allows the RAID group to survive two drive failures. With only one parity drive (P) we have RAID 5. When there are two parity drives (P +Q) we have RAID 6. Info on how RAID 6 works is widely available on the internet.</P> Tue, 24 Apr 2018 13:20:13 GMT https://community.netapp.com/t5/EF-E-Series-SANtricity-and-Related-Plug-ins/What-is-the-extra-Q-calculation-and-uses-for-whic-raid-level/m-p/139784#M553 MitchBlackburn 2018-04-24T13:20:13Z https://community.netapp.com/t5/EF-E-Series-SANtricity-and-Related-Plug-ins/What-is-the-extra-Q-calculation-and-uses-for-whic-raid-level/m-p/139785#M554 <P>Thank you.&nbsp;</P> Tue, 24 Apr 2018 13:24:27 GMT https://community.netapp.com/t5/EF-E-Series-SANtricity-and-Related-Plug-ins/What-is-the-extra-Q-calculation-and-uses-for-whic-raid-level/m-p/139785#M554 UgurD 2018-04-24T13:24:27Z