HP 3PAR StoreServ 7400 2-node HP 3PAR Management Console 4.3.0 Software User&a - Page 423
the HP 3PAR Management Console and InForm CLI., Virtual Volume
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snapshot administration space snapshot data snapshot data space solid state drive source system source volume spare, spare chunklet SSD stale snapshot step size system manager target mode target, target port template thin provisioning Thinly Provisioned Virtual Volume (TPVV) TPVV unspecified property user data user size user space virtual copy virtual copy consistency group virtual size virtual volume VLUN The space on a virtual volume that is used to track changes to the data since a snapshot of a virtual volume was created. Data written to the base volume's snapshot data space to record changes to the base volume after the first virtual copy of that volume was created. The space on a virtual volume that holds the data that has been changed since the first virtual copy was created. A data storage device that uses solid-state memory to store persistent data. See primary system. The virtual volume from which a copy is made. A chunklet that is reserved for use in case of a failure in the system. A certain number of chunklets are reserved for use as spares during the system setup and installation process. However, the system may temporarily set aside additional spares even though these chunklets are not permanently designated for use as spares. See solid state drive. A snapshot that does not track the most recent changes to its base volume. The No Stale Snapshots virtual copy policy halts writing data to the base volume so as to prevent loss of sync between the volume and any snapshots. See also virtual copy policy and no stale snapshots. The number of contiguous bytes that the system accesses before moving to the next chunklet. Software component that negotiates between the storage system and the user interfaces such as the HP 3PAR Management Console and InForm CLI. The firmware setting for a port that is connected to a host. The port that is connected to and receives commands from a host computer. Also known as a host port. See VLUN template. See HP 3PAR Thin Provisioning. A virtual volume that maps to logical disk space associated with a common provisioning group (CPG) and is therefore capable of growing on demand. See Thinly Provisioned Virtual Volume. When using the HP 3PAR Management Console, a property that has been included in a template but does not have a defined value. When applying the template, the system will either use the default value (when applicable) or calculate the optimized setting for you. For standard base volumes, the data that is written to the user space. The amount of user space in a virtual volume, or the size of the volume as presented to the host. The space on a virtual volume that represents the size of the virtual volume as presented to the host. For standard base volumes, the user space holds all user data. For thinly provisioned virtual volumes, no storage is actually allocated to user space, so the user space represents the volume's virtual size. See also virtual size. A snapshot, or copy-in-time, of another volume (a base volume or another virtual copy) created using copy-on-write techniques. A group of snapshots created from multiple virtual volumes at the same time in order to ensure consistency. The size that the volume presents to the host. For standard base volumes, the virtual size is equal to the user space. For thinly provisioned virtual volumes, no storage is actually allocated to user space, so the virtual size is determined by whatever value is assigned to the user space. See also user space. A virtual storage unit created by mapping data from one or more logical disks. See also logical disk, mapping. A pairing between a virtual volume and a Logical Unit Number (LUN), expressed as either a VLUN template or an active VLUN. 423