iSCSI

iSCSI (Internet Small Computer Systems Interface) is a protocol that carries SCSI commands over IP networks. The technology facilitates the connection of storage systems over long distances, making it an important element of storage area networks (SANs).

Principle of iSCSI
The way iSCSI works is to encapsulate SCSI commands into TCP/IP packets, which are then transmitted over Ethernet. The process involves two main components: the iSCSI initiator and the iSCSI target.

The iSCSI initiator is a client-side component that sends SCSI commands to the iSCSI target device. The target then processes these commands and returns the requested data to the initiator.

iSCSI versus SCSI
. Unlike conventional SCSI, which uses parallel cables for connectivity, iSCSI takes advantage of widespread Ethernet networks. This makes iSCSI a cost-effective and adaptable solution for organizations of all sizes.

In addition, the use of standard iSCSI networking hardware reduces the need for specialized hardware, making it a more cost-effective solution than traditional SCSI.

Benefits of iSCSI

• Scalability. iSCSI makes it easy to grow storage capacity without significant hardware changes.
• Scalability.
• Cost-effective. Using existing Ethernet infrastructure, iSCSI reduces the need for specialized hardware.
• Flexibility. The use of IP networks in iSCSI allows data to be stored and retrieved over long distances.

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Implementation of iSCSI
Implementing iSCSI involves configuring an iSCSI initiator on the server and configuring an iSCSI target device on the storage device. Most modern operating systems, including Windows, Linux, and macOS, come with built-in iSCSI initiators. On the other hand, configuring an iSCSI target requires an iSCSI-enabled storage device, such as a network attached storage (NAS) device or a dedicated iSCSI device.