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Hardware architecture CentricStor - Virtual Tape Library
2.2 Hardware architecture
Figure 3: Example of a CentricStor configuration
In this example, CentricStor comprises the following hardware components:
● a VLP (Virtual Library Processor), which monitors and controls the CentricStor
hardware and software components
● two ICPs (Integrated Channel Processors), which communicate with the hosts via
ESCON (via ESCON Director), FICON (via FICON switch) or FC (via FC switch)
● two IDPs (Integrated Device Processors), which communicate with the tape drives in
the robot system via SCSI or FC
● one or more RAID systems for the TVC (Tape Volume Cache) for buffering logical
volumes
● an FC switch, which is used by the ICP, IDP, and VLP to transfer data
● a CentricStor console for performing configuration and administration tasks
● a LAN connection between CentricStor and the robot system
● a LAN connection, which is used by the ICP, IDP, and VLP for communication
The PLM (Physical Library Manager) and VLM (Virtual Library Manager) are software
components which are particularly important for system operation (see page 34).
CentricStor
TVC
Robots
CentricStor
Console
SCSI
SCSI
SCSI
SCSI
Real
Real
LAN
IDP
IDP
tape drives
tape drives
LAN
FC Switch
Mainframe
Mainframe
ESCON
UNIX/Windows
FC
Switch
FICON
Switch
ESCON
Director
FICON
ICP
Virtual
tape drives
ICP
Virtual
tape drives
LAN
LAN
VLP
PLMVLM