Calculating Change in Backup Environment

[Dennis, Melburn (IT Solutions US)]

Currently, our backup environment employs a 90-day / 7 revision backup
policy.  My customer has come to me to find out how much our backup data
would grow or shrink if we went to a 21-day / 21-revision backup policy.
Have any of you out there experience requests like this before, and if
so, how were you able to get a reasonable guestimate of this.
 
Mel Dennis
Systems Engineer II
 
Siemens IT Solutions and Services, Inc.
Energy Data Center Operations
4400 Alafaya Trail
MC Q1-108
Orlando, FL 32826
Tel.: 407-736-2360
Mob: 321-356-9366
Fax: 407-243-0260
mailto:melburn.den...@siemens.com
www.usa.siemens.com/it-solutions