Benefits: 

• Able to increase the amount of available disk space by moving old, unused data to tape.
• Will decrease the amount of data needed to be backed up.
• Basically transparent to the end user.
• Automated, based on pre-determined criteria. 

Disadvantages: 

• It is Unix only.
• There are a few minute delays when pulling files from tape are not explained to the user.
• Poor tools exist for determining how much will be migrated ahead of time.
• Must use NetBackup as the backup software to prevent “non-informed” backup software from migrating files back to disk from tape when they back them up.
• The current recommended size of file migration is 1 MB or larger due to the database and stub size.
• A deleted file is only “marked” for deletion on tape.  Eventually, a tape could have many deleted files and the tape could be “reconciled” to recover space, however that process is time consuming and would require operator manual actions.
• To conserve resources, the duplicate tapes are generally not moved offsite until full – which may be several weeks.
• Disaster recovery would not be a top priority.  The normal backup/restore environment would be recovered first.  Current DR Procedures have the Storage Migrator system rated very low.  Symantec Technical Support would be needed to recover the system.
• The system currently can only be used in corporate network areas.

https:://www.bestitdocuments.com/Samples