All RAID groups in an aggregate should have a similar number of drives. The RAID groups do not have to be exactly the same size, but you should avoid having any RAID group that is less than one half the size of other RAID groups in the same aggregate when possible. For RAID-DP, the recommended range of RAID group size is between 20 and Using RAID-DP. RAID-DP was introduced in Data ONTAP version Creating RAID-DP Volumes. To create an aggregate (or traditional volume) with RAID-DP RAID groups, select the option when provisioning storage with NetApp graphical tools or add the –t raid_dp switch to the aggr create or vol create commands. If a volume is configured for RAID 4 protection, there is one parity disk. If a volume is configured for RAID DP protection, there are 2 parity disks. Note: Data ONTAP and later supports two types of RAID protection, RAID 4 or RAID DP (double-parity), which you can assign on a per-volume basis. Raid dp netapp calculatorAlso this includes a new feature called Raid Group Size Estimator where you key in disks values, raid type and disk type - the software will attempt to provide the best RG size values either based on NetApp recommendations or Optimal Capacity.(Please note: The Raid group size input in the calculator is only for disk space calculations and this. NetApp Usable Space Calculator This calculator computes usable space for NetApp FAS storage system based on disk size and aggregate configuration parameters. Supported RAID levels are RAID 4, RAID-DP and RAID-TEC. The RAID 6 calculator is not a NetApp supported tool but is provided on this site for academic purposes. Questions on this tool can be sent [email protected]incipe.top refer to RAID EQN at start of the subject line. NetApp developed a closed-form RAID 6 equation that calculates the reliability of data stored on NetApp RAID-DP. This calculator allows to compute and compare usable space for two NetApp FAS storage system configurations. The first configuration is aimed at achieving the maximum usable disk space for the given number of disk drives. The second configuration is aimed at keeping the number of drives per RAID group within the recommended range. Aug 01,  · NetApp Usable Space Calculator ver (With NetApp RAID-DP™, a RAID group operating in degraded mode can undergo one additional disk failure without suffering data loss.) The number of spares you need varies based on the number of disk drives attached to your storage system. For a lower-end FAS or FAS with a single shelf, one Author: Murugappan.This calculator computes usable space for NetApp FAS storage system based on disk size and Supported RAID levels are RAID 4, RAID-DP and RAID-TEC. NetApp Usable Space Calculator. This calculator allows to compute and compare usable space for two NetApp FAS storage RAID type: RAID-DP, RAID -DP. How about the max/default RAID size for different type disk? using this tool has some idea of the RAID sizes beforehand and will key it in. How to calculate a volume's usable and physical space If a volume is configured for RAID DP protection, there are 2 parity disks. This tool was created to aid in finding NetApp usable disk space and is not . in Aggregate" set it up as a RAID-DP and give it 1 spare drive per FAS head. - if you are looking

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