HP ProLiant DL380G5-WSS 3.7.0 HP StorageWorks HP Scalable NAS File Serving Sof - Page 103

7 Configure dynamic volumes HP Scalable NAS includes a Cluster Volume Manager that you can use to create, extend, recreate, or delete dynamic volumes. Dynamic volumes allow large filesystems to span multiple disks, LUNs, or storage arrays. Dynamic volumes can be deported from the cluster and later imported back into the original cluster or into another cluster. Overview Basic and dynamic volumes Volumes are used to store PSFS filesystems. There are two types of volumes: dynamic and basic. Dynamic volumes are created by the Cluster Volume Manager. They can include one or more disks, disk partitions, or LUNs that have been imported into the cluster. These entities are called subdevices. A single PSFS filesystem can be placed on each dynamic volume. Additional subdevices can be added to a dynamic volume as necessary, and the filesystem on the volume can also be extended. A basic volume consists of a single disk, disk partition, or LUN that has been imported into the cluster. A PSFS filesystem is then created directly on the disk, partition, or LUN. Basic volumes can be converted to dynamic volumes. Types of dynamic volumes HP Scalable NAS supports two types of volumes: striped and concatenated. The volume type determines how data is written to the volume. • Striping. When a dynamic volume is created with striping enabled, a specific amount of data (called the stripe size) is written to each subdevice in turn. For example, a dynamic volume could include three subdevices and a stripe size of 64 KB. That amount of data will be written to the first subdevice, then to the HP Scalable NAS File Serving Software administration guide 103