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Access "New connections: SAS and iSCSI HBAs"

Published: 20 Oct 2012

New server-to-storage host bus adapters offer significant performance gains, but there are some pitfalls to avoid. Out with the old, in with the new: Serial-attached SCSI (SAS) and iSCSI host bus adapters (HBAs) are the new vanguard in server-to-storage connectivity. SAS HBAs are poised to replace parallel SCSI HBAs, while iSCSI HBAs offer companies the option to use an Ethernet storage network in lieu of a more costly Fibre Channel (FC) SAN for all of their servers. Of course, SAS and iSCSI HBAs address different corporate storage connectivity needs. SAS HBAs help eliminate storage I/O throughput bottlenecks to internal or direct-attached storage (DAS) while expanding the number of storage devices a single server can address to more than 16,000. iSCSI HBAs open the door for organizations to connect high-performance servers to their Ethernet storage network. A single SAS HBA card such as LSI Logic Corp.'s LSISAS3080X-R contains eight separate ports for I/O. Each port can operate at 3Gb/sec at half duplex and can concurrently communicate with both SAS and ... Access >>>

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Features
  • Columns
    • Storage Bin: Duplessie's theory of evolution

      Evolutionary changes in the storage world have opened the door to scores of smaller companies. Some of these startups have seized the opportunity, taking advantage of the current market dynamics. Good for them; but it's even better for you, with more choice and innovation than we've seen in a long time.

    • Hot Spots: Remote workers, stand up and be counted

      Remote-office workers need to share their experiences with corporate IT because there are many different issues associated with working remotely and a wide range of products to address those problems.

    • Best Practices: Balance workloads with RAID types

      Vendors will tell you how beautifully parity-based RAID works in their storage subsystems, making it almost unnecessary to use any type of striped/mirrored RAID protection. But if you don't match the workload profile of the application to how storage is provisioned in the array, you could wind up with a poorly balanced system.

    • Editorial: Who will run the storage shop?

      Who will run the storage shop?

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