If you restore many stubs with complete files, the file system can run out of space. If the file system runs out of space, the Tivoli® Storage Manager for Space Management client must migrate files to make room for more restored files. The restore process can be slowed.
If the backup versions and migrated files reside on the same Tivoli Storage Manager server, you can restore backup versions of resident files but restore migrated and premigrated files as stub files. Use the dsmc restore command and set the restoremigstate option to YES (the default) in your dsm.sys file.