SAN – Merits & Demerits


Merits
v  Improvements to application availability:
·         Storage is independent of applications and accessible through multiple data paths for better reliability, availability, and serviceability.
v  Higher application performance:
·         Storage processing is off-loaded from servers and moved onto a separate network.
v  Centralized and consolidated storage:
·         Simpler management, scalability, flexibility, and availability.
v  Data transfer and vaulting to remote sites:
·         Remote copy of data enabled for disaster protection and against malicious attacks.
v  Long distance connectivity:
·         With Fibre channel capable of running up to 10 kilometers, we can keep our data in a remote, physically secure location.  Fibre channel switching also makes it very easy to establish private connections with other SANs for mirroring, backup, or maintenance.

Demerits
v  High initial cost
·         SANs are very expensive as Fibre channel technology tends to be pricier and maintenance requires a higher degree of skill. Also, there are a few SAN product vendors due to its very high price and very few mega enterprises need SAN set up.
 
v  Not leveraging on existing technology investments
·         Leveraging of existing technology investments tends to be much difficult. Though SAN facilitates to make use of already existing legacy storage, lack of SAN-building skills has greatly diminished deployment of homegrown SANs. So currently pre-packaged SANs based on Fibre channel technology are being used among the enterprises.