NEC S4900 Quick Manual page 4

Advanced Technologies
Excellent Management and Operational Functions
Ultra high-performance
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with ultra high availability
Using ultra high speed cross bar technology connecting cache
function and node function the NEC S Series storage provides
for end-to-end performance and availability. The S4900 has a
bandwidth of 192GB/s which allows for high-speed access to
data even with many servers attached. Redundancy provides for
full data availability even in the event of a component failure.
*1: HA: Host Adapter *2: DA: Disk Adapter v in the case of S4900
Cache redundancy
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prevents response degradation
The cache for the S4900 has two sets of mirrored cache. The
redundancy permits cache writes even in the event of a cache
failure. This provides for safe and high-speed response.
v in the case of S4900
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Equipped with 4Gbps FC host interface
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Maximum bandwidth of 400MB/s with 4Gbps FC host interface
allows high speed response even with many servers connected.
RAID 6 substantially increases availability
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As the capacity of disk drives increase, it takes substantially
longer to re-build data in the event of a disk drive failure. Using
RAID 6, which utilizes dual parity, this is minimized and can
also accommodate two drive failures without any loss of data
availability.
Virtual capacity management
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The Dynamic Pool function allows LUN capacity to be expanded
or reduced in a RAID 6 environment without disruption to the
application.
*1: Expansion by 6 or 10 HDDs for S4900