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Adaptec 39160 - SCSI Card Storage Controller U160 160 MBps Guía de usuario Pagina 27

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A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS VER A02
PAGE 27 11/17/2005
• Table 4-2: PV22xS Configuration Topologies Vs RAID Level Performance
PV22xS Configuration Topologies
RAID Levels
Joined Split Cluster
RAID 0
Default RAID 0
performance
Best performance, if
configured across multiple
channels
Similar to Joined
topology
RAID 1
Default
Increased Availability, if
mirror set is on separate
channel
Default
RAID 5
Default Default Default
RAID 10
Default
Higher performance than
RAID 1 with same increased
availability
Default
RAID 50
Default
Increase availability, if
spanned across separate
channels
Default
It can be observed that selection of a PV22xS configuration topology impacts not only
Application Attributes but also impacts RAID level performance. Besides these
configuration topologies, PV22xS provides some common capabilities as listed below for
the storage solution:
Redundancy Capabilities
• Physical SCSI Data Path Redundancy
PV22xS using two Enclosure Management Modules (EMM) provides redundant
data path when configured in Cluster topology.
• Management Redundancy
With multiple EMMs in PV22xS, hardware redundancy is provided when servicing
enclosure management requests
• Power Supply Redundancy
PV22xS is capable of running on single power supply; multiple power supplies
provide 1+1 redundancy
• Cooling Redundancy
PV22xS provides support of up to 2 fan units; each fan unit has 2 blowers in all
making 4 fan blowers. The unit is thermally designed to continue operating with 1
of 4 fan blower failure, thus giving a 3+1 cooling redundancy
Reliability Capabilities
• Thermal Reliability
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