FUJITSU CentricStor V3.1D - Manual (Page 50)

50 U41117-J-Z125-7-76
Optional system functions CentricStor - Virtual Tape Library
All supported robot archive types are permitted:
– ADIC AML systems (with DAS)
– ADIC scalar systems (with DAS or SCSI)
– StorageTek systems (with ACSLS or SCSI)
– IBM Cashion
– Fujitsu robot (with LMF)
Please refer to the current product information for the library and drive type configurations
currently available. It is possible to have different drive types within the same archive.
However, a separate physical volume group must be configured for each drive type (see
section “Partitioning on the basis of volume groups” on page 63 ).
2.9.3 Dual Save
Based on the volume group functionality (see page 63 ), CentricStor offers the Dual Save
function. This involves making a copy of a logical volume on a second physical volume,
which may be located either in the same robot archive (Dual Local Save) or in a remote
robot archive (Dual Remote Save). This ensures the highest possible level of data security.
If a physical volume which usually contains a large number of logical volumes is in some
way corrupted (e.g. due to a tape error), CentricStor can access a copy of this logical
volume created on a different physical volume. If the copy is located in a second robot
archive, then even the complete destruction of the first robot archive would not cause any
irrevocable loss of data.
In many computer centers, for example, it is currently common practice to move the
volumes written during a backup operation (or copies generated by the application) to a
secure location directly on completion of the backup. The Dual Remote Save functionality
provides an elegant means of automating this procedure. Not only does it relieve the host
application of any copy or move operations, it also eliminates the need to transport the
cartridges to a second archive (and back again). The associated risk of data manipulation
is thus excluded.