Hitachi Unified Storage VM, Product Overview Manual

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Hitachi Unified Storage VM Product Overview Guide
2–2
Hardware overview
Block module storage system
This section briefly describes the Unified Storage VM block module storage
system.
The HUS VM block module storage system can be configured in many ways,
starting with a one-rack, diskless system to a multi-rack system that
includes the following:
• A 5U controller chassis
• Up to 48 standard 2U 24-drive boxes
• Up to 24 4U 48-drive dense drive boxes
• Up to eight 2U 12-drive flash module drive boxes
The system supports a maximum of 1,152 SFF, LFF, and FMD data drives or
a combination of the two. The system supports up to 128 SSD drives and
up to 96 flash module drives.
The HUS VM block module storage system controller chassis contains the
control logic, processors, memory, and interfaces to the drive boxes and the
host servers.
The HUS VM block module storage system supports multiple cache
configurations, with a maximum of 256 GB. The system provides a highly
granular upgrade path, allowing the addition of disk drives to the drive
chassis, and both main (cache) and processor blades as needed to increase
system capacity and performance as storage needs increase.
All system components are mounted in either a standard Hitachi Data
Systems 19-inch, 42U rack, or a customer-supplied rack that meets the rack
specifications listed in the Hitachi Unified Storage VM Block Module
Hardware User Guide .
The following sections provide descriptions and illustrations of the HUS VM
block module storage system and its components.