Storage: 10 storage system performance tips

http://searchstorage.techtarget.com/tip/Storage-performance-management-10-storage-system-performance-tips?utm_content=stoperformance&asrc=EM_USC_14704079&track=NL-58&ad=846050&Offer=mn_eh082611STRGRETN_stoperformance&

Using continuous data protection (CDP) in your backup and recovery plan: A tutorial

http://searchdatabackup.techtarget.com/tutorial/Using-continuous-data-protection-CDP-in-your-backup-and-recovery-plan-A-tutorial

IBM Storage Efficiency Calculator

http://www-304.ibm.com/partnerworld/wps/storage/efficiency/calculator.html