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General XTCC
CentricStor recognizes various ISP types.
ICP Integrated Channel Processor
An ICP has a permanent connection to one or more BS2000/OSD, z/OS or
OS/390 hosts via ESCON/FICON adapters or to an open systems host via an
FC controller operating as a host connection. Host adapters and virtual devices
are available only on ICPs.
IDP Integrated Device Processor
An IDP always has at least one tape drive connected via SCSI or FC and an
associated PDS. Physical devices are available only on IDPs.
VLP Virtual Library Processor
Any ISP which is neither an ICP nor an IDP is regarded by the configuration
routine as a VLP.
ICP_IDP In small CentricStor configurations, the ICP and IDP are on a shared processor.
Several processors of the same type are, if necessary, configured next to each
other. The VLP functionality resides with one of these ICP_IDP.
The diagram below shows the XTCC representation of an ICP:
ISP type
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