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Glossary
VLP ISP which has neither a host nor a device port. Some central management
processes, in particular VLM und PLM, run on this ISP. A CentricStor
system can contain two VLP-ISPs. The central management processes
then only run on one of these, the VLP Master. The other, the Standby VLP
(SVLP), is inactive except for monitoring the VLP Master.
VTC In the small CentricStor models VTC and SBU this is the only ISP and
combines the attributes of the ICP, IDP and VLP. For the TVC the local
disks are configured to form a RAID10 instead of an external RAID system.
Figure 39: CentricStor configuration with 5 ISPs (2 ICPs, 2 IDPs and one VLP
IUP ➟ ICP_IDP
LD
A logical drive is a virtual, non-physical drive. In CentricStor up to 64 logical drives can
be operated per ICP.
Logical Drive ➟ LD
Logical Volume ➟ LV
Logical Volume Group ➟ LVG
LV
A logical volume (LV) is a file which is stored temporarily in a Tape File System of the
Tape Volume Cache (TVC) and stored permanently in a physical volume (PV). The
standard size in an LVG is 900 MB, but this can be selected in discrete steps: 2, 5, 10,
20, 50, 100 oder 200 GB.
No more than 500,000 LVs can be defined in a CentricStor system, the name of each
(VSN) being unique in the system.
LVG
Group of logical volumes for which the same rules apply.
CentricStor
Console port
IDP
ICP
ICP
VLP
IDP
Robot
Host
ports
ports
TVC
FC switch