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StorGateTM Storage Gateway for VOS Continuum to EMC CLARiiON Connectivity SCSI Model Product Brief
StorGate meets all requirements for a certified host. By using StorGate, Stratus VOS Continuum users can store and retrieve VOS data on their existing storage arrays while maintaining full support for their equipment.
Key Features
Subsystem Overview StorGate provides a connection between a VOS Continuum BIO (K450/K460) port and EMC CLARiiON host adapter port. StorGate "on-the-fly" disk emulation and data translation capabilities allow VOS Continuum users to store and retrieve data on a CLARiiON just as if the data were stored on standard Stratus disks.
Each StorGate unit provides access to up to 12 virtual VOS disk volumes on the CLARiiON. Each of these virtual disks may be a VOS D706, D711, or a D712 disk type. This means that each StorGate unit allows a VOS Continuum to access up to 408 GB (physical) on a CLARiiON storage array. Multiple StorGate units may be attached to multiple BIO ports on a single VOS Continuum host to provide access to as much CLARiiON storage capacity as desired, up to the maximum allowed by VOS (3.2 TB logical, 6.4 TB physical). Multiple StorGate units may also be used to allow multiple VOS Continuum hosts to access one or more CLARiiON storage arrays. (Although StorGate allows multiple VOS hosts to store data on a single CLARiiON, VOS limitations prevent sharing that data between hosts.) StorGate supports all VOS disk-related commands and functions. It uses standard RAID hypers and metavolumes to store VOS data on an EMC CLARiiON storage array. This allows the CLARiiON to manage VOS virtual disks as standard RAID storage volumes. Both mirrored and Raid-S volume types are supported. Physical Connections A VOS Continuum host connects to StorGate through a Continuum BIO (K450/K460) SCSI port. A CLARiiON connects to StorGate through a Fibre Channel port on a CLARiiON Fibre Channel host adapter. (Refer to the StorGate Technical Specifications for connection details.) Performance Laboratory tests indicate that for many applications StorGate provides throughput which equals or exceeds that of equivalent Stratus disks. In these laboratory tests the best performance was achieved when the virtual disks on the Target were configured as Target-specific mirrored metavolumes. Performance in other environments may vary, and depends upon a variety of factors. These factors include application data access patterns, overall Target configuration, and I/O activity by other hosts attached to the Target. Product Support DRA products purchased through Stratus are supported jointly by DRA and Stratus. DRA products purchased directly from DRA are supported through the Co-active Maintenance Service (CMS). CMS is a total support agreement which is available "around the clock, around the world" to participating DRA customers. Product maintenance, product updates, documentation and training are available through CMS support. CMS is provided free of charge for 90 days following product installation, and may be extended by contract thereafter.
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The DRA StorgateTM Storage Gateway
is a drop-in solution which provides VOS Continuum hosts with seamless access to
VOS data on EMC CLARiiON storage arrays.