Why would an iSCSI solution be implemented?

Question

Options

• AAll storage arrays supply GigE ports
• BBlock storage over IP is much faster than FC
• CiSCSI HBAs are inexpensive
• DLeverage existing IP network infrastructures

• A
  6% (2)
• B
  16% (5)
• C
  3% (1)
• D
  74% (23)

Explanation

Drivers for IP SAN Traditional SAN enables the transfer of block I/O over Fibre Channel and provides high performance and scalability. These advantages of FC SAN come with the additional cost of buying FC components, such as FC HBA and switches. Organizations typically have an existing Internet Protocol (IP)-based infrastructure, which could be leveraged for storage networking. Advancements in technology have enabled IP to be used for transporting block I/O over the IP network. This technology of transporting block I/Os over an IP is referred to as IP SAN. IP is a mature technology, and using IP as a storage networking option provides several advantages. When block I/O is run over IP, the existing network infrastructure can be leveraged, which is more economical than investing in a new SAN infrastructure. In addition, many robust and mature security options are now available for IP networks. Many long distance, disaster recovery (DR) solutions are already leveraging IP-based networks. With IP SAN, organizations can extend the geographical reach of their storage infrastructure. iSCSI is encapsulation of SCSI I/O over IP. iSCSI is an IP based protocol that establishes and manages connections between host and storage over IP. iSCSI encapsulates SCSI commands and data into an IP packet and transports them using TCP/IP. iSCSI is widely adopted for connecting servers to storage because it is relatively inexpensive and easy to implement, especially environments in which an FC SAN does

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