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iSCSI: The Universal Storage Connection by John L. Hufferd

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4. An Overview of iSCSI

To the Reader

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The following text is at a fairly high level. However, readers can skip to the various summaries within the chapter and then pick up with the overall chapter summary.

iSCSI is a transport protocol that carries SCSI (Small Computer System Interface) commands from host computer systems (referred to as initiator systems) to target devices. To understand how this is done, we need first to understand the system structure behind SCSI command creation and delivery. (See Figure 4-1 for an iSCSI version of this structure.)

Figure 4-1. Application-to-LU command flow.

The host system is made up of applications ...

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