Fujitsu Siemens Computers pmn User Manual page 25

CentricStor - Virtual Tape Library
As soon as a mount job is issued, the Library Manager checks whether the requested
volume is already in the disk cache. If so, the volume is immediately released for processing
by the application. If not, CentricStor requests the corresponding cartridge to be mounted
onto a physical drive, and reads the logical volume into the disk cache.
CentricStor thus operates as a very large, extremely powerful, highly intelligent data buffer
between the host level and the real archive system.
It offers the following advantages:
removal of device bottlenecks through virtualization
●
transparency to the host thanks to the retention of interfaces unchanged
●
support for future technologies by isolating the host from the archive system
●
CentricStor thus provides a long-term, cost-effective basis for modern storage
management.
U41117-J-Z125-7-76
The CentricStor principle
25