A client asked me today to help out with an auditing problem. They need to show to their auditors that they have demonstrated the ability to recover from a backup regularly.
But by default, Data Protector removes any restore session older than 30 days.
The magic variable is KeepObsoleteSessions and it is in /etc/opt/omni/server/options/globals (or on Windows C:\ProgramData\omniback\config\server\options\global or some variation depending on where you installed it).
I set KeepObsoleteSessions=3650, which means that they will still see their restore sessions 10 years from today.
Of course, they will also see barcode scanning sessions, backup sessions without media and various other irrelevant sessions, but they are happy with that.
Greg Baker is an independent consultant who happens to do a lot of work on HP DataProtector. He is the author of the only published books on HP Data Protector (http://www.ifost.org.au/books/#dp). He works with HP and HP partner companies to solve the hardest big-data problems (especially around backup). See more at IFOST's DataProtector pages at http://www.ifost.org.au/dataprotector