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EMC Fibre Channel Storage-System Configuration Planning
About Fibre Channel Storage Systems and Networks (SANs)
Types of Storage System Installations
You can use a storage systems in any of several types of installation:
• Unshared direct with one server is the simplest and least costly;
• Shared-or-clustered direct lets two clustered servers share
storage resources with high availability (FC4500 storage systems;
and
• Shared switched, with one or two switch fabrics, lets two to 15
servers share the resources of several storage systems in a Storage
Area Network (SAN) Shared switched installations are available
in a high-availability (HA) version, with two HBAs per server,
with two switches, or with one HBA per server and one switch.
Figure 1-8 Types of Storage System Installation
Storage systems for any shared installation require EMC Access
Logix™ software to control server access to the storage system LUNs.
The Shared-or-clustered direct installation may be either shared (that
is, use Access Logix to control LUN access) or clustered (without
Access Logix, using cluster software to control LUN access),
depending on the hardware model.
Disk-array storage systems
Server
Adapter
Adapter
Server
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Server
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Shared-or-Clustered Direct
(two servers)
Switch fabric Switch fabric
Shared Switched
(multiple servers)
Unshared Direct
(one or two servers)
Path 1
Path 2