Understanding How Your Content Is StoredContent on your px4-300d Network Storage is stored in Shares and iSCSI volumes. To access content inShares, your client computer uses network protocols, such as AFP and Windows File Sharing. The px4-300d's file system maintains the physical location of content that resides in volumes used for Shares.Block-level data is stored in iSCSI drives. File systems for iSCSI volumes are maintained by theconnected host computer and not the px4-300d.Shares reside on volumes, which along with iSCSI volumes, reside in Storage Pools. Volumes allow youto partition space in Storage Pools, and Storage Pools group multiple physical drives together into a singlelogical unit to provide redundancy, availability and capacity. All the drives in a Storage Pool must be thesame size and should have the same protection (for example, RAID 1 RAID 5).All disks within a single Storage Pool must meet the following requirements:● Same manufacturer● Same rotational speed● Same capacityMixed disk configurations may result in unpredictable device behavior and will not be supported. Ifyou need technical assistance, please be prepared to backup your data and remove anyunsupported drives or configurations.Storage PoolsA Storage Pool is a grouping of drives with a certain storage size and an assigned data protection. AStorage Pool has a minimum of one drive. By default, your px4-300d has one Storage Pool.Storage Pool Data ProtectionFor each Storage Pool, you can select its type of protection. Protection type determines how data isreplicated across a Storage Pool and determines the amount of space used for data protection andstorage. The drives in your px4-300d are protected using a built-in, pre-configured technology thatredundantly stores data across the drives, so that if a single drive fails, in most cases, you will not lose anydata. This technology, known as RAID (Redundant Array of Independent Disks), enables a series ofdrives to act together as a single storage system. If you create multiple Storage Pools, you can assigndifferent RAID types to each Storage Pool.For more information on selecting RAID types, refer to Changing RAID Protection Types.VolumesA Volume is a single storage area. A volume can be comprised of one or more hard drives. In a single-volume system, the volume consists of the entire storage space. Shares reside in volumes. iSCSI drivesalso reside in volumes.Storage Pool Management47 Understanding How Your Content Is Stored
