Introduction - Fujitsu Siemens Computers pmn User Manual

1 Introduction

With CentricStor, a virtual tape robot system is placed in front of the real tape robot system
(with the real drives and cartridges). In this way the host and the real archive are fully
decoupled. The virtual tape robot system knows what are referred to as virtual (logical)
drives and virtual (logical) volumes. The core element here consists principally of a disk
system as data cache, guaranteeing not only extremely high-speed access to the data, but
also, thanks to the large number of virtual drives (up to 512) and logical volumes (up to
500 000) which can be generated, that the bottlenecks which occur in a real robot system
can be cleared.
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