EMC FC4700 - page 22

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EMC Fibre Channel Storage System Model FC4700 Configuration Planning Guide
About Fibre Channel FC4700 Storage Systems and Storage Networks
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 to be
accessible by more than one server, if, as shown above in Figure 1-9,
the servers run cluster software.
The following figure shows access control through Storage Groups.
Each server has exclusive read and write access to its designated
Storage Group.
Figure1-10 Data Access Control with Shared Storage
EMC1812
Highly available cluster
Admin Server
Adapter 00 Adapter 01
Operating
system A
Inventory Server
Adapter 02 Adapter 03
Operating
system A
E-mail Server
Adapter 04 Adapter 05
Operating
system B
Adapter 06 Adapter 07
Web Server
Operating
system B
SP A SP B
LUN
LUN
LUN
LUN
LUN
LUN
LUN
LUN
LUN
LUN
Admin Storage Group
Dedicated Data access
by adapters 00, 01
Inventory Storage Group
Dedicated Data access
by adapters 02, 03
E-mail andWeb Server
Storage Sroup Shared
Data access by
adapters 04, 05, 06, 07
Path 1
Path 2
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