Fujitsu Siemens Computers pmn User Manual page 615

Redundant Array of Independent Disks ➟
Reorganisation
Depending on the configuration paramters, the logical volumes (LVs) saved on the
physical volumes (PVs) are automatically copied onto other physical volumes (PVs) of
the same physical volume group (PVG). This is done for the following reasons:
–
–
–
This procedure is called Reorganisation. Reorganisation of an individual physical disk
(PVs) 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 (ISPs and external
systems) 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
Small Backup Unit ➟
Standby VLP ➟
Storage Area Network ➟
SVLP
The SVLP (Standby VLP) is an ISP of the type
processes envisaged for a
Master when the latter crashes
➟
section "VLP (Virtual Library Processor)" on page 27
U41117-J-Z125-7-76
Effective use of the physical volumes (PVs) available
Prevention of physical and chemical aging processes
Faulty or inaacessible physical volumes (PVs)
VTC with the software components MAREN and ROBAR.
SBU
SVLP
SAN
RAID system
VLP are inactive until it takes over the tasks of the
(AutoVLP failover
VLP in which the central management
function).
Glossary
RAID
VLP
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