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StarTech University offers computer enthusiasts and IT professionals a chance to learn more about new technologies and innovations in the IT world. Take some time to review the material, then pass the exam to earn your printable certificate for each course.

Course 2: SCSI School

Chapter 7: The Future of SCSI

As interface technologies have advanced, many of the key selling points of the original SCSI have been replaced by the newer, faster interface properties of more modern standards such as SATA/SATA II etc. It is important to note that while many organizations have replaced SCSI with its successors, many organizations still prefer the benefits offered by legacy SCSI devices. As such, SCSI is far from obsolete.

It is also of interest to note that SCSI is still evolving. Newer standards, such as SAS (Serial Attached SCSI) and iSCSI continue to flourish, even when compared to the newer standards. iSCSI, for instance, has achieved broad support from operating systems such as Windows, Linux and Netware to name a few, while Serial Attached SCSI continues to grow in enterprise settings based on the impressive data transfer rates it has to offer.


Also called "Internet SCSI", ISCSI was developed by the IETF (Internet Engineering Task Force), and became an official standard in February of 2003. This IP-based standard is used to transfer data by carrying SCSI commands over IP networks, and link data storage devices via an IP-based network.

iSCSI supports a Gigabit Ethernet interface, and allows systems capable of supporting the iSCSI interface to directly connect to standard Gigabit Ethernet switches and/or IP routers. Of particular importance to SAN (Storage Area Network) technology, iSCSI enables a SAN to be deployed within a LAN (Local Area Network), WAN (Wide Area Network) or MAN (Metropolitan Area Network).


Another recent offshoot of the SCSI standard, SAS (Serial-Attached-SCSI) offers users a replacement for the parallel SCSI interface. Used primarily for the transfer of data to and from devices such as hard drives, optical drives etc, SAS is a serial communication protocol for direct attached storage devices.

Designed for the corporate and enterprise markets, SAS offers users much faster data transfer rates (up to 3Gbps) than were previously available. Another key feature of Serial-Attached-SCSI is that it offers backwards compatibility with the SATA interface. Although SAS is a Serial communication, unlike traditional SCSI devices, it still uses SCSI commands with SAS End devices.

Next — Chapter 8: SCSI Products