Seagate ST9500530NS Enterprise-Optimized 6Gb/s SAS Rivals Fibre Channel Perfor
Seagate ST9500530NS - Constellation 7200 500 GB Hard Drive Manual
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- Seagate ST9500530NS | Enterprise-Optimized 6Gb/s SAS Rivals Fibre Channel Perfor - Page 1
years Serial Attached SCSI (SAS) has fundamentally altered the enterprise storage landscape. Building on the rock-solid reliability and robust command set of its parallel SCSI predecessor, SAS raised the storage bar with an unprecedented combination of performance (3-Gb/s transfer rate), scalability - Seagate ST9500530NS | Enterprise-Optimized 6Gb/s SAS Rivals Fibre Channel Perfor - Page 2
number of drives to rewrite the rules for enterprise storage, this increasingly found in high-end enterprise arrays. time setting its sights 6Gb/s SAS does so while retaining compatibility with earlier SAS and SATA hard drives. • JBOD/RAID (just-a-bunch-of-disks/redundant array of independent - Seagate ST9500530NS | Enterprise-Optimized 6Gb/s SAS Rivals Fibre Channel Perfor - Page 3
protection Retains compatibility with earlier SAS/SATA hard drives and SCSI software/ middleware Management efficiencies Utilizes can now support up to 256 devices. What's more, 6Gb/s SAS expanders support secure zones, similar to fibre channel SAN zones. Utilizing denial of service and device - Seagate ST9500530NS | Enterprise-Optimized 6Gb/s SAS Rivals Fibre Channel Perfor - Page 4
was a host-based process. As long as the number of SAS drives in the storage pool was relatively small, this discovery scheme was reasonably cables (up to 10 meters, an increase from the 6-meter cables supported by 3Gb/s SAS). Achieving this improvement in throughput and maximum cable length - Seagate ST9500530NS | Enterprise-Optimized 6Gb/s SAS Rivals Fibre Channel Perfor - Page 5
(SFF-8087) and external (SFF-8088, Figure 4) connectivity. Standardizing on mini-SAS connectors is particularly appropriate for the data center, where these connectors are becoming increasingly commonplace through their use on small form factor (SFF) 2.5-inch hard drives. Investment Protection With
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Introduction
In just a few short years Serial Attached SCSI (SAS) has
fundamentally altered the enterprise storage landscape. Building on
the rock-solid reliability and robust command set of its parallel SCSI
predecessor, SAS raised the storage bar with an unprecedented
combination of performance (3-Gb/s transfer rate), scalability
(thousands of devices in one domain) and flexibility (compatibility
with SATA).
In Q3 2005, 3Gb/s SAS systems entered the market and by 2007
were shipping in volume quantities. SAS has supplanted parallel
SCSI as the direct-attached SCSI interface of choice throughout the
enterprise; indeed, it was one of the fastest interface transitions in
market history.
This rapid transition relied on the close working relationship
between the SCSI Trade Association (STA) and the T10 Committee.
The STA focuses on identifying SCSI’s marketing requirements and
providing the forum to reach a consensus on features and benefits
found on the SCSI roadmap, while the role of the T10 Committee
is to develop standard specifications to make it possible for those
features and benefits to be implemented in commercial products.
The T10 Committee developed the new SAS-2 technical
specification (SAS protocol and physical interface enhancements
for transporting SCSI over serial links at up to 6 Gb/s), and the STA
has given the marketing name “6Gb/s SAS” to this new industry
standard (see Figure 1).
Enterprise-Optimized 6Gb/s
SAS Rivals Fibre Channel
Performance and Scalability
at Lower Cost
Technology Paper