Architecture Storwize V7000 provides a very similar architecture to SVC, using the RAID code from the DS8000 to provide internal managed disks and SSD code from the DS8000 for tiered storage. Features and software All Storwize systems offer the following features: Command line interface Graphical user interface (GUI) for easier use (CLI commands can be displayed as details), with (nearly) all functions available Thin Provisioning known as Space Efficient Volumes Volumes can be resized, i.e. expanded or reduced (only advisable, if supported by the operating system) RAID levels 0,1,5,6,10 Distributed RAID (DRAID), i.e. DRAID-5 and DRAID-6 FlashCopy provides Snapshots with several combinations of these attributes: multiple, incremental, independent, space-efficient, immediately writable, or cascaded Data Migration: data can be moved between all virtualized storage (both internal and external) with no disruption Performance Management using throttling of bandwidth and transactions either by host or by volume supports interactive and non-interactive ssh-login supports several ways of call home and notifications (e-mail, syslog, SNMP, VPN-to-IBM, gui-based) security functions, e.g. audit log, encrypted access In addition, other Storwize systems offer the following features (some of them may require licenses): Automated tiered storage known as EasyTier, which supports hot spot removal within a tier (intra-tier) and between tiers (inter-tier) Encryption for data at rest (all available original drives are self encrypting) Peer to Peer Remote Copy Metro Mirror (synchronous copy) Global Mirror (asynchronous copy) Global Mirror with Change Volumes (checkpointed asynchronous copy using flashcopies, e.g. for low bandwidth) External Storage Virtualization Virtual Disk Mirroring Real-time Compression Data Reduction Pools with Deduplication and Real-time Compression Clustering, i.e. single user interface for several (up to 8) controllers, while supporting volume moves between them without disruption Stretched cluster configuration (SVC only), optional "enhanced" version with site awareness (hardware redundancy only across sites) Hyperswap (automated storage failover using the standard multipathing drivers; hardware redundancy on either site is given) In addition, the Storwize V7000 Unified offered the following features: File level storage (NAS) Policy based file placement Active Cloud Engine Global Namespace Async replication on File level Limitations Most Storwize systems are intended for certain environments and provide several features, that are not licensed by default. There are several types of licenses that depend on the chosen model and the subject of the license: licenses per net capacity (mainly with the SVC, where tiers can be treated differently) licenses per enclosures (the controller and each expansion need one) licenses per