Switched-PCI alternative for storage

As storage-system makers begin to adopt alternative interconnect technologies, switched-PCI is providing them a means of expanding and improving the overall performance of their systems.

As storage-system makers begin to adopt alternative interconnect technologies, switched-PCI is providing them a means of expanding and improving the overall performance of their systems, according to data from PLX Technology.

A growing number of storage systems are implementing architectures that provide higher data speeds, data availability and system scalability.

Storage attached network (SAN) and networked attached storage (NAS) system makers are faced with an array of storage challenges: limited capacity of existing data buses used on those systems, bottlenecks between computers and storage resources, and multiple resources sharing data.

Switched-PCI - a technology that expands existing PCI systems into broader, faster and more reliable systems - is providing storage-system makers a practical solution to meet those challenges.

The PLX GigaBridge switched-PCI architecture is enabling storage-system makers to break the I/O bottleneck between computers/servers and storage resources.

A single GigaBridge controller provides a simple replacement for a PCI-to-PCI bridge, while multiple controllers create a multilink PCI network through which stored data can be transferred quickly.

By expanding the capacity of the PCIbus, a storage system realises faster speeds - up to 50Gbit/s aggregate - as well as high availability and system scalability.

"Storage-system makers are looking constantly for ways to improve their product offerings, and therefore are receptive to adopting new technologies that will improve the solutions they provide the information-technology industry", said Paul Zorfass, senior analyst at International Data Corp/FTI.

"By implementing a switched-PCI architecture such as GigaBridge, system makers are able to build high performance, scalability and availability into the feature mix".

The PLX GigaBridge switched PCI architecture enables PCI-based telecommunications, data communications and embedded systems to incorporate up to 224 PCIbus segments, aggregate tens of gigabits per second, and connect two adjacent PCI devices up to 15ft away, via a high-performance link.

A cell-based architecture with independent PCIbus segments connected to each port, each GigaBridge switched PCI controller can drive up to four PCI slots and interoperates with other GigaBridge controllers as ports on the switched-PCI systems.

Each GigaBridge controller is linked via two 16bit-wide, point-to-point, low-voltage-differential links clocked at 400MHz.

This results in an aggregate bandwidth of more than 50Gbit/s.

(This was Electronicstalk's Top Story on 20 August 2002).

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