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SANs Overview

SANs Overview

Storage area networks are another solution to the limitations of Direct Attached Storage (DAS) and Networked Attached Storage (NAS). Using a network to access storage devices addresses the scalability limitations of DAS. Storage can be consolidated, addressing the issue of management of disks in DAS.

SAN uses disk block I/O, with no intermediate protocol and performance limitations of NAS. SAN removes the storage I/O from the LAN, improving both storage access performance and LAN messaging performance.


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