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RAID Multi-Parity (MP) aka RAID 6 or double parity.RAID 5 aka RAID 50 (must be enabled from the CLI for NL or FC drives).The HPE 3PAR StoreServ supportthe following RAID types: The RAID type, space allocation, growth increments, and other logical disk parameters are specified when you create a CPG or can be modified later. Each RAID set is made up of chunklets from different physical disks.Logical disks are pooled together in common provisioning groups, which allocate space to virtual volumes.The underlying logical disks are automatically created by the HPE 3PAR OS when you create VVs. Logical disksĪ logical disk is a collection of chunklets arranged as rows of RAID sets. A chunklet is assigned to only one logical disk. Chunklets are automatically created by the HPE 3PAR OS, and they are used to create logical disks. On all current HPE 3PAR StoreServ all chunklets are 1 GB. Each chunklet occupies physically contiguous space on an FC, NL or SSD disk. Physical disks are divided into chunklets. CageĬage is a legacy HPE 3PAR term and is interchangeable with “Drive Enclosure,” “Enclosure” and “Drive Shelf.” Chunklets The virtual volumes are exported to hosts and are the only data layer visible to hosts.Ī physical disk is a hard drive (spinning media or Solid State Drive) located in an HPE 3PAR StoreServ drive enclosure. Virtual volumes use storage space provided by CPGs. Common provisioning groups are groups of logical disks. Logical disks are created from groups of chunklets. Each layer is created from elements of the layer above. The relationship between system data layers is illustrated in Figure 1.
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The HPE 3PAR StoreServ array is comprised of the following logical data layers