optimize the use of network bandwidth. Key hardware features also include: Dual controllers with up to 480 TB of capacity 8GB Cache (4GB per controller), with optional upgrade to 16GB RAID levels 0, 1, 5, 6, and 10 Storwize V3700 also offers management and interoperability features from previous Storwize systems, include simple management capabilities, virtualization of internal storage and thin provisioning for improved storage utilization and one-way data migration to easily move data onto Storwize V3700. SAN Volume Controller An entry-level SAN Volume Controller configuration contains a single I/O group, can scale out to support four I/O groups and can scale up to support 4,096 host servers, up to 8,192 volumes and up to 32 PB of virtualized storage capacity. Hardware details (per node - an I/O group consists of TWO nodes): Chassis: 2U rack-mountable (Based on IBM System x 3650 M4 server) Processor: one (optionally two) Intel Xeon E5-2650v2 2.6 GHz 8-core Optional compression accelerator cards (up to two) Memory: 32 GiB (optionally 64 GiB) Connection: Four (optionally, 8 or 12) 8 Gbit/s Fibre Channel ports Storage: Three 1 Gbit/s and optionally four 10 Gbit/s iSCSI/FCoE ports Supports up to two SSD expansion enclosures (up to 48 SSDs per I/O group) Power: Two power supplies and integrated battery units Flex System V7000 Storage Node Flex System V7000 released in 2012 and can scale up to 240 2.5" disks per control enclosure, or 960 2.5" disks per clustered system. Hardware details: Redundant dual-active intelligent controllers Cache: 16 GiB per control enclosure (8 GiB per internal controller) as a base Connection: SAN-attached 8 Gbit/s Fibre Channel, 10 Gigabit Ethernet (GbE) FCoE and iSCSI host connectivity Control enclosures support attachment of up to 9 expansion enclosures (internal and external mix) with configurations up to 960 drives. Software: This is not supported at v7.3.0. External links IBM Storage Virtualization IBM Storwize Products References IBM storage servers