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Managed System for SAN Storage Agent User's Guide
Data migration of ACSLS to EXTERNAL is recommended. Migrate the
existing data from existing (old) storage pools to new storage pools
associated with the appropriate policy, device class, and library
definitions. Migration of data also allows the entire environment to be
LAN-free, providing better performance and better utilization of tape drives
and media.
Figure 8 displays the normal migration path from an old storage pool
containing the data associated with the ACSLS library type to a new storage
pool associated with an EXTERNAL library type and an ECARTRIDGE device
class.
Figure 8. Legacy ACSLS Data Migration

Two methods to migrate data are:
- Use the Tivoli Storage Manager server MOVE DATA command. This
method allows the legacy ACSLS data to move to a new storage pool without
moving any expired files in the aggregates. For more information, see
the Managing Storage Pools and Volumes section of the Administrator's
Guide.
- Use the Tivoli Storage Manager server storage pool reclamation
function. This method works by reclaiming the active files from the
legacy ACSLS storage pools. Reclamation processing, however, is very
resource intensive and should be performed during periods of low resource
utilization. For more information, see Reclaiming Space in Sequential
Access Storage Pools section of the Administrator's
Guide.
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