Storage Networking Architectures
Storage Area Network
SAN Strengths and Limitations
Servers and storage can Initial implementation
scale independently costs higher than NAS
Does not impact and is Can be complex to
not impacted by LAN manage
Provides higher specialized training
Interoperability is an
issue in heterogeneous
Strengths of SANs:
The underlying benefit of SANs is that they allow servers and storage to
scale independently: Adding new storage does not require adding new
servers, and multiple servers can access the same storage devices.
Because storage traffic is routed over a separate network, storage traffic
does not compete for bandwidth with data networking applications. This
makes it easier for storage administrators to guarantee sufficient
bandwidth for storage and ensures that bandwidth-intensive storage
traffic does not disrupt other applications.
Access to storage is not subject to the failure of a single server,
operating system, or application, and systems can be geographically
separated for disaster tolerance.