Storage Networking Architectures
Comparing Solutions
Cost Comparison
Cost
SAN
nal
DAS
i
o
at
NAS
p
er
O
Implementation Cost
Networked storage is about 55 to 60 percent less expensive than a
comparable DAS environment, based on a 2 terabyte system over a three-
year period:
Subsystem costs: Networked storage capacity can be shared between
many servers and used more efficiently:
Typical disk capacity utilization rates:
DAS = 30–50%;
NAS/SAN = 70–90%
Resulting storage subsystem savings: 40–66% (in a large
implementation)