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SAS challenges Fibre Channel drives
This article is part of the Storage magazine issue of Vol. 8 Num. 9 January 2010
In their 3 Gbps incarnation, SAS drives have proved popular in low-end and nearline data storage systems, but at 6 Gbps, SAS-2 poses a serious threat to Fibre Channel interface drives. Since its introduction in 2004, serial-attached SCSI (SAS) has become the prevailing data storage interface in servers and is on a trajectory to become the same for external storage systems. Those systems are still dominated by Fibre Channel (FC) and serial ATA (SATA) disk drives, but next-generation SAS-2 components, available since early 2009, are hastening this transition. With 6 Gbps transfer rates and enhancements that neutralize some of the shortcomings of SAS 1.1, SAS-2 has overtaken FC as the most advanced and fastest disk interface. Because FC drives with their 4 Gbps transfer rate and 3.5-inch form factor have reached the end of the road, it's only a question of time as to when SAS will emerge as the drive interface of choice for high-end storage systems and servers. Thanks to its prevalence in servers today, SAS -- mostly 3 Gbps SAS -- ...
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Features in this issue
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In their 3 Gbps incarnation, SAS drives have proved popular in low-end and nearline data storage systems, but at 6 Gbps, SAS-2 poses a serious threat to Fibre Channel interface drives and could change the landscape of high-end storage arrays.
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