Hitachi VSP Gx00 series - Page 360

in use), for the following Hitachi products: ShadowImage for Mainframe, Dataset Replication, and
Compatible
FlashCopy
®
V2.
See also source volume.
TC
Hitachi TrueCopy
TI
See Thin Image.
tiered storage
A layered structure of performance levels, or tiers, that matches data access requirements with the
appropriate performance tiers. The tiers are:
Tier 1: Static content. Tier 1 is fully supported computing expected to be production quality.
Tier 2: Application logic. Tier 2 platforms are not supported by the security ocer and release
engineering teams. Tier 2 systems are targeted for Tier 1 support, but are still under development.
Tier 3: Database. Tier 3 platforms are architectures for which hardware is not or will not be available
or that are considered legacy systems unlikely to see broad future use.
Tier 4 systems are not supported.
total capacity
The aggregate amount of storage space in a data storage system.
TPF
Transaction Processing Facility
V
V-VOL
virtual volume
VDEV
See virtual device.
view mode
The mode of operation of Device Manager - Storage Navigator that allows viewing only of the
storage system conguration. The two Device Manager - Storage Navigator modes are view mode
and modify mode.
virtual device (VDEV)
A group of logical devices (LDEVs) in a RAID group. A VDEV typically consists of some xed volumes
(FVs) and some free space. The number of xed volumes is determined by the RAID level and device
emulation type.
virtual volume (V-VOL)
A logical volume in a storage system. A V-VOL has no physical storage space.
Thin Image uses V-VOLs as secondary volumes of copy pairs.
In Dynamic Provisioning, Dynamic Tiering, and active ash, V-VOLs are called DP-VOLs.
VLUN
Hitachi Virtual LUN
Glossary
System Administrator Guide for VSP Gx00 models and VSP Fx00 models 360