I have a primary storagepool which is file based, I'm trying to back it up
to a test copystoragepool and am getting asked to mount the file volume and
can't understand why.

Storage Pool Name DIRECTORY_FILE
Storage Pool Type PRIMARY
Device Class Name DIRECTORY
Estimated Capacity (MB) 5120.0
Pct Util 5.3
Pct Migr 10.0
Pct Logical 99.2
High Mig Pct 95
Low Mig Pct 90
Migration Processes 1
Next Storage Pool DIRECTORY_TAPE
Maximum Size Threshold -
Access READWRITE

=======================

Volume Name F:\TIVOLI\TSM\SERVER1\00005088.BFS
Storage Pool Name DIRECTORY_FILE
Device Class Name DIRECTORY
Estimated Capacity (MB) 512.0
Pct Util 53.6
Volume Status FILLING
Access READWRITE
Pct. Reclaimable Space 18.4
Scratch Volume? Yes

=======================

Storage Pool Name TEST
Storage Pool Type COPY
Device Class Name LTO
Estimated Capacity (MB) 0.0
Pct Logical 100.0
Migration Processes -
Next Storage Pool -
Maximum Size Threshold -
Access READWRITE
Overflow Location -
Cache Migrated Files? -
Collocate? NO
Reclamation Threshold 100
Maximum Scratch Volumes Allowed 5

=======================

ANR0984I Process 224 for BACKUP STORAGE POOL started in
                       the BACKGROUND at 13:22:39.

ANR2110I BACKUP STGPOOL started as process 224.
ANR1210I Backup of primary storage pool DIRECTORY_FILE to
                       copy storage pool TEST started as process 224.

ANR0609I BACKUP STGPOOL started as process 224.
ANR1228I Removable volume F:\TIVOLI\TSM\SERVER1\00005088.-
                       BFS is required for storage pool backup.


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