1. © 2009 IBM Corporation Statements of IBM future plans and directions are provided for information purposes only. Plans and direction are subject to change without notice. Premium Features Ryan Leonard Storage and Solutions Architect

2. Statements of IBM future plans and directions are provided for information purposes only. Plans and direction are subject to change without notice. System Storage July 2009 Storage Partitions  Creates multiple virtual storage systems  Heterogeneous host support  Storage-based implementation helps provide data integrity  Logical partitioning helps provide flexibility Host Server DS3000 / DS4000 / DS5000

3. Statements of IBM future plans and directions are provided for information purposes only. Plans and direction are subject to change without notice. System Storage July 2009  Partitioning can be implemented at the host and/or host group level  Number of partitions required dependant on the desired configuration  Partitions licensed in increments – 2, 4, 8, 16, 32, 64, 128, 256, 512 Storage Partitions Host Server Scenario 1 3 stand-alone servers Scenario 2 3 servers, 1 cluster (i.e. ESX, Windows Cluster, etc.) Scenario 3 3 servers, mixed case 3 partitions 1 partition4 partitions

4. Statements of IBM future plans and directions are provided for information purposes only. Plans and direction are subject to change without notice. System Storage July 2009 FlashCopy  A point-in-time (PiT) image of a logical drive / LUN –Logical equivalent of a physical copy  Features –Near instantaneous copy –Requires less disk space than a full copy –Can be mapped to any host –Can be read from, or written to  Primary uses –PiT backup image –File / volume restoration –Data mining / analysis Base Volume Snapshot Reserve FlashCopy Volume A’ B C A B C C’ A C Physical Logical

5. Statements of IBM future plans and directions are provided for information purposes only. Plans and direction are subject to change without notice. System Storage July 2009 FlashCopy  Advantages –Created nearly instantaneously –Space efficient Default is 20% size of the original  Disadvantages –Pointers to original data set Rely on original data being available –Can impact performance

6. Statements of IBM future plans and directions are provided for information purposes only. Plans and direction are subject to change without notice. System Storage July 2009 Volume Copy  Complete (byte-by-byte) PiT replication of one logical drive (source) to another (target) within a storage system –Target logical drive also referred to as a clone  Primary uses –Full PiT data set available for analysis, mining, testing, backup Helps eliminate I/O contention on the primary logical drive Production Server Analysis Server

7. Statements of IBM future plans and directions are provided for information purposes only. Plans and direction are subject to change without notice. System Storage July 2009 VolumeCopy  Advantages –Data resides on (potentially) separate set of spindles Physically distinct clone  Disadvantages –Requires similar disk space to original 1TB logical drive volumecopy requires another 1TB to copy to –Not created instantaneously The larger the logical drive, the longer it takes to build clone

8. Statements of IBM future plans and directions are provided for information purposes only. Plans and direction are subject to change without notice. System Storage July 2009 Enhanced Remote Mirroring  Storage-based data replication –Ongoing, real-time replication of a logical drive from one DS4000 storage subsystem to another  Three mirroring modes –Metro Mirror –Global Copy –Global Mirror  Primary uses –Disaster recovery –Centralize backup data –Centralize data mining / analysis A1 B1 mirror A1 mirror B1 Cross mirroring SAN / WAN

9. Statements of IBM future plans and directions are provided for information purposes only. Plans and direction are subject to change without notice. System Storage July 2009 Metro Mirror  Synchronous mirroring between DS4000 storage subsystems  Limit of 10 km  Constant synchronization between primary logical drive and secondary logical drive  Writes to both the local primary logical drive and the remote secondary logical drive must complete before I/O completion status is returned to initiating host server

10. Statements of IBM future plans and directions are provided for information purposes only. Plans and direction are subject to change without notice. System Storage July 2009 Global Copy  The primary storage subsystem no longer waits for the secondary I/O to complete  Latency issues are eliminated  Unlimited distances  Up to 128 outstanding I/Os per logical drive  Increased performance  Benefit: Flexibility in designing remote mirroring solutions

11. Statements of IBM future plans and directions are provided for information purposes only. Plans and direction are subject to change without notice. System Storage July 2009  Ensures that all I/Os to the secondary system are in the same order as it was processed at the primary  Eliminates out-of-order arrivals at the remote site  Logical drives defined in a consistency group participate in write order consistency  Optional mode  Benefit: Provides proper database logical consistency for successful recovery Global Mirror (Write Consistency)