FUJITSU CentricStor V3.1D - Manual (Page 615)

U41117-J-Z125-7-76 615
Glossary
Redundant Array of Independent Disks
➟
RAID system
Reorganisation
Depending on the configuration paramters, the logical volumes ( LV s) saved on the
physical volumes ( PV s) are automatically copied onto other physical volumes ( PV s) of
the same physical volume group ( PVG ). This is done for the following reasons:
– Effective use of the physical volumes ( PV s) available
– Prevention of physical and chemical aging processes
– Faulty or inaacessible physical volumes ( PV s)
This procedure is called Reorganisation. Reorganisation of an individual physical disk
(
PV s) can also be initiated by the administration.
➟
section “Reorganization of the tape cartridges” on page 37
➟
section “Reorganization” on page 73
SAE
The SAE enables CentricStor to be operated from a remote PC (SAE computer) via the
graphical user interface (
GUI ).
SAN
The entire data flow between all CentricStor components ( ISP s and external RAID
system s) is handled via an internal Starage Area Network (SAN) which can be configured
redundantly. It is implemented by one high-performance FC switch or, if redundancy is
provided, by two high-performance FC switches.
2 FC technologies are available: Multi Mode and Single Mode. In Multi Mode the devices
which are connected via Fibre Channel can be located up to 300 m from each other; in
Single Mode
the distance can be as much as 10 km.
SBU
The SBU (Small Backup Unit) is a small CentricStor model and consists of a robot
system and a
VTC with the software components MAREN and ROBAR.
Small Backup Unit
➟
SBU
Standby VLP
➟
SVLP
Storage Area Network
➟
SAN
SVLP
The SVLP (Standby VLP) is an ISP of the type VLP in which the central management
processes envisaged for a VLP are inactive until it takes over the tasks of the VLP
Master when the latter crashes ( AutoVLP failover function ).
➟
section “VLP (Virtual Library Processor)” on page 27