HP StoreOnce 4430 HP D2D Backup System Concepts guide (EH985-90915, March 2011 - Page 3

Contents 1 Before you start 5 Overview...5 NAS targets for backup applications 5 Virtual Tape Library targets for backup applications 5 Comparing NAS and Virtual Tape Library targets 6 Connecting to the HP StoreOnce Backup System 6 For more information...6 2 Virtual Tape Devices 7 Overview...7 Emulation types...7 Creating and configuring virtual tape devices 8 Limitations on the number of devices 8 Flexible emulation (G2 products only 9 VTL devices on an Ethernet network 10 Backup applications and Replication Target libraries 11 VTL devices on Fibre Channel 11 Fibre Channel topologies...11 Zoning...12 3 NAS shares 13 Operating system support...13 Backup application support...13 Maximum number of NAS shares 13 Maximum number of files per NAS share and appliance 13 Maximum number of users per CIFS share 14 Maximum number of hosts per NFS share (G2 products only 14 4 Data deduplication 15 What is data deduplication?...15 Data deduplication and the HP StoreOnce Backup System 15 Tape rotation example with data deduplication 16 5 Replication 18 Replication overview...18 HP StorageWorks Replication Manager (HP D2D4xxx Series only 19 Replication concepts and terminology 20 Replication deployment strategies 26 Replication Licensing...28 Seeding the Target Appliance 29 Recovering a Source Appliance 30 6 Housekeeping 33 What is housekeeping?...33 What effect does housekeeping have on performance 33 Why is housekeeping important 33 What do I need to do?...33 Contents 3