EMC CX500I Configuration Guide - Page 28

Access Control with Shared Storage, associated LUNs compose a Storage Group. - cx500 parts

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About CX300, CX500, CX500i, and CX700 Storage Systems Highly available cluster File server Operating system A Mail server Operating system A Database server Operating system B Adapter Adapter Adapter Adapter Adapter Adapter Path 1 Path 2 FC Switch or LAN FC Switch or LAN SP A SP B LUN Cluster Storage Group LUN LUN LUN LUN Physical storage system with up to 240 disks per system Database Server Storage Group LUN LUN EMC1811b Figure 1-11 Sample Shared Storage Configuration Access Control with Shared Storage Access control permits or restricts a server's access to shared storage. Configuration access, the ability to configure storage systems, is governed by the storage system software security mechanism: a set of privileges based on username and password that's stored, encrypted, on one or more storage systems in a network. Data access, the ability to read and write information to storage-system LUNs, is provided by Storage Groups. During storage-system configuration, the system administrator uses a management utility to associate a server with one or more LUNs. The associated LUNs compose a Storage Group. Each server sees its Storage Group as if it were an entire storage system, and never sees the other LUNs on the storage system. Therefore, it cannot access or modify data on LUNs that are not part of its Storage Group. However, you can define a Storage Group as 1-16 EMC CLARiiON CX300, CX500, CX500i, and CX700 Storage Systems Configuration Planning Guide

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EMC CLARiiON CX300, CX500, CX500i, and CX700 Storage Systems Configuration Planning Guide
About CX300, CX500, CX500i, and CX700 Storage Systems
Figure 1-11
Sample Shared Storage Configuration
Access Control with Shared Storage
Access control permits or restricts a server’s access to shared storage.
Configuration access, the ability to configure storage systems, is
governed by the storage system software security mechanism: a set of
privileges based on username and password that’s stored, encrypted,
on one or more storage systems in a network.
Data access, the ability to read and write information to
storage-system LUNs, is provided by Storage Groups. During
storage-system configuration, the system administrator uses a
management utility to associate a server with one or more LUNs. The
associated LUNs compose a Storage Group.
Each server sees its Storage Group as if it were an entire storage
system, and never sees the other LUNs on the storage system.
Therefore, it cannot access or modify data on LUNs that are not part
of its Storage Group. However, you can define a Storage Group as
EMC1811b
Highly available cluster
File server
Operating
system A
Mail server
Operating
system A
Database
server
Operating
system B
SP A
SP B
LUN
LUN
LUN
LUN
LUN
LUN
LUN
Physical storage
system with up to
240 disks per system
Cluster Storage
Group
Database Server
Storage Group
Path 1
Path 2
Adapter
FC Switch
or
LAN
FC Switch
or
LAN
Adapter
Adapter
Adapter
Adapter
Adapter