Dell PowerVault 220S Manual
Also see for PowerVault 220S: Installation guideManualNoticeUpdating firmwareService manual
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Contents
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A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS VER A02PAGE 19 11/17/20054. PV22xS Enclosure OverviewThe PV22xS SCSI Enclosure provides three configuration topologies, also referred to asmodes, which are end-user configurable: Joined, Split, and Cluster topologies, as shownin Figure 4-1. A 3-position switch located on the Split Bus Module (SBM) sets the desiredenclosure topology. Each of these topologies will be further explained in more detailbelow. The configuration will not take effect until the enclosure is power cycled which isdesigned to protect from accidental topology changes. SCSI Enclosure Services (SES)management features are an integral part of the enclosure. SES provides a unique set offeatures to monitor critical environmental variables such as temperature and power status.Figure 4-1 PV22xS TopologiesJoined Bus TopologyThis is the simplest topology of operation providing access to all 14 hard drives on oneshared SCSI bus. Only one cable must be attached between the server and the primaryEnclosure Management Module (EMM) in the enclosure. If operating with two EMMmodules, which provide redundant SES services, a second cable should not be attachedto the secondary EMM. There can only be one physical path from the enclosure to theserver. Attaching a second cable is not supported and may lead to SCSI bus addresscontention. If SES redundancy is not required, a Terminator module can be substituted inplace of secondary EMM. |
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