Networked Attached Storage (NAS)
NAS provides both storage and a file system. NAS permits multiple system storage sharing which centralizes and simplifies storage management, replaces direct attached storage, and reduces operating costs. NAS is often contrasted with SAN (Storage Area Network), which provides only block-based storage and leaves file system concerns on the "client" side. Despite their differences, SAN and NAS are not mutually exclusive, and may be combined as a SAN-NAS hybrid, offering both file-level protocols (NAS) and block-level protocols (SAN) from the same system.
NAS is useful for more than just general centralized storage provided to client computers in environments with large amounts of data. NAS can enable simpler and lower cost systems such as load-balancing and fault-tolerant email and web server systems by providing storage services. NAS allows many computers to access the same set of files over a network without competing with a designated server’s processor resources. Organizations can implement NAS as part of more sophisticated storage area network architecture.
Storage Area Networks (SAN)
SAN is an architecture to attach remote computer storage devices (such as disk arrays, tape libraries, and optical jukeboxes) to servers in such a way that the devices appear as locally attached to the operating system. A SAN typically is its own network of storage devices that are generally not accessible through the regular network by regular devices.
With the cost and complexity of SANs dropping and with new, cheaper and cutting edge solutions from technology vendors, SANs enjoy a much wider adoption across both enterprise and small to medium sized business environments. With exponential increases in the amount of accumulated and stored data, SANs have become an important storage solution providing centralized locations for data backup and management.
Internet Small Computer System Interface (iSCSI)
iSCSI is an Internet Protocol (IP)-based storage networking standard for linking data storage facilities. iSCSI can be used to transmit data over local area networks (LANs), wide area networks (WANs), or the Internet and can enable location-independent data storage and retrieval. It is a popular storage area network (SAN) protocol, allowing organizations to consolidate storage into data center storage arrays while providing hosts (such as database and web servers) with the illusion of locally-attached disks. iSCSI storage reduces operating costs and simplifies storage management. Unlike traditional Fibre Channel, which requires special-purpose cabling, iSCSI can be run over long distances using existing network infrastructure.
iSCSI is an excellent way to allow server computers (such as database servers) to access disk volumes on storage arrays. iSCSI SANs give you the benefits of storage consolidation and the more efficient allocation of storage. iSCSI SANs improves disaster recovery by allowing entire disk arrays to be migrated across a WAN with minimal configuration changes, in effect making storage "routable" in the same manner as network traffic.
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For more information or answers to your questions about our NAS,SAN and iSCSI Solutions, please take a moment to fill out our 
