User's Manual

hp StorageWorks File System Extender User Guide 125
Note that files that were deleted from an HSM file system and whose file data was stored on FSE medium
volumes that were subsequently reorganized can no longer be recalled. This happens when all migrated
generations of the deleted files were considered obsolete (outdated) by the FSE media reorganization
process and all medium volumes that stored these file generations were reorganized.
CAUTION: When sensitive data is to be completely erased from the FSE implementation, you must ensure
that they are first deleted from the HSM file system, and then reorganize its FSE media so that all migrated
generations (and all additional copies if multiple copying is configured for the appropriate FSE partition) of
the data are considered as obsolete.
Resource allocation
FSE resources are physical and logical objects, controlled by the FSE implementation. For detailed
information on configuring resources, see chapter ”Configuring FSE” on page 37.
Resource allocation concepts
FSE resources can be grouped according to their characteristics, as follows:
• Physical resources:
• FSE libraries, each library includes FSE library slots
• FSE drives
• Logical resources:
• FSE media cartridges, each medium includes FSE medium volumes
• FSE media pools
The figure below schematically shows the resources as they are represented in the FSE implementation
Figure 21 Example of FSE resources
Central FSE resource manager
All resources of the FSE implementation are controlled by a central Resource Manager. It manages the
Resource Management Database and allocates resources. Resource allocation is used each time an FSE