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ONTAP FlexArray

RAID protection for array LUNs

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Storage arrays provide RAID protection for the array LUNs that they make available to ONTAP. ONTAP does not provide RAID protection.

ONTAP uses RAID0 (striping) for array LUNs. ONTAP supports a variety of RAID types on the storage arrays, except RAID0 because RAID0 does not provide storage protection.

When creating RAID groups on storage arrays, you need to follow the best practices of the storage array vendor to ensure that there is an adequate level of protection on the storage array so that disk failure does not result in loss of data or loss of access to data.

Note

  • A RAID group on a storage array is the arrangement of disks that together form the defined RAID level.

    Each RAID group supports only one RAID type. The number of disks that you select for a RAID group determines the RAID type that a particular RAID group supports. Different storage array vendors use different terms to describe this entity—​RAID groups, parity groups, disk groups, Parity RAID groups, and other terms.

  • ONTAP supports RAID4 and RAID-DP on native disk shelves, but supports only RAID0 on array LUNs.