EMC FC5300 User Manual download pdf (Page 25)

About Switched Shared Storage and SANs (Storage Area Networks)

1-13

About Fibre Channel Storage Systems and Networks (SANs)

Figure 1-10 Sample SAN Configuration

Access Control with Shared Storage

Access control permits or restricts a server’s access to shared storage.

There are two kinds of access control:

• Configuration access control

• Data access control

Configuration access control lets you restrict the servers through

which a user can send configuration commands to an attached

storage system.

Data access control is provided by Storage Groups. During storage

system configuration, using a management utility, the system

administrator associates a server with one or more LUNs.

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, the servers

run cluster software.

Highly available cluster

SP A

LUN

Cluster

Storage Group

Database Server

Storage Group

Physical storage

systems with up to

100 disks per storage

system

Switch fabric

File Server Mail Server Database Server

Adapter

Operating

system A

Adapter

Operating

system A

Adapter

Operating

system B

SP B

Switch fabric

Path 1

Path 2

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EMC FC5300 User Manual Page 25

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