A retention level setting is programmable by you.  That is, you can make 
Level "n" be just about any amount of time you wish. 

If you need, for example, a 10-year retention, pick one of your unused 
levels and change its value to 10 years.  On the v5.1 Admin Console, 
this is done by choosing the property sheet for a master server under 
NetBackup Management/Host Properties.

cheers, wayne

WEAVER, Simon wrote, in part:
> */Regarding the "retension" setting under any schedule. After 1 year, 
> it moves from Infinity Level 9 to Level 24./*
> *//* 
> */Just what level should be used it you want to retain something for 
> say 10 years./*