Dell PowerVault 221S Optimizing Dell SCSI Solutions - Page 26

A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS Cable Connector VER A02 Controller Connector P-type connector - Male P-type connector - Female VHDCI-type connector - Male VHDCI-type connector - Female • Figure 4-7 External SCSI Connector PV22xS Configuration Topology and Application Attributes PV22xS provides different configuration topologies, which may impact the storage solution for an application. All PV22xS configuration modes have various benefits for application attributes and are summarized as depicted in Table 4-1 and Table 4-2: • Table 4-1: PV22xS Configuration Topologies Vs Application Attributs Application Attributes Joined PV22xS Configuration Topologies Split Cluster Reliability Default Default Default Relatively better than Joined topology - Availability Default depending on RAID High level (see Table 4-2 for details) Serviceability All interconnect components are Field Replaceable units Redundancy Performance Data Protection Scalability Cost • Not on SCSI Path • Management capabilities with both ZEMMs • Not on SCSI Path • Management capabilities with both ZEMMs Depends on HDD and ZEMM technology - U160/U320 Provides both data and management Relatively lower performance due to RAID controller configuration requirements Default Default Default Maximum Could be lower with Single ZEMM and non-redundant PSU Minimum (for a given topology) Same as Joined, but one HDD less Requires two ZEMMs, but can be lower with non-redundant PSU PAGE 26 11/17/2005