Storage Networking Architectures
Comparing Solutions
Scalability and Availability
SAN
l
i
ty
abi
NAS
Scal
DAS
Availability
Networked storage improves scalability:
Storage devices can be scaled independently of servers.
Storage media allocation can be adjusted quickly to suit changing
business requirements.
SANs offer the best scalability because they logically separate servers
and storage.
Networked storage improves availability:
Multiple points of access prevent one server failure from denying access
to storage resources.
SANs provide the highest levels of availability through server clustering
and through disaster-tolerant configurations in which data is replicated to
multiple geographically dispersed locations.