Frequently asked questions-NAS FAQNAS concepts <<previous|next>> :Why select NAS over other storage networking solutions, such as iSCSI and Fibre Channel SANs?
If NAS is so valuable, then why don't more people have NAS?
SANs do have the advantage of interoperability; SANs work in any environment and application. For example, Microsoft doesn't support Exchange on proprietary file systems, which is what NAS uses. So people aren't going to implement email, a fundamental enterprise application, on a NAS. As another example, you can run databases on NAS, but traditionally they are run on a SAN. NAS is 'smarter' with its file-level awareness, but that awareness also introduces some latency that limits NAS performance relative to a SAN. All this forces you to think a bit about where you should use NAS vs. SAN.
Check out the entire NAS FAQ guide.
27 Jul 2007