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Is the Alacritech iSCSI Accelerator an iSCSI HBA (Host Bus Adapter)?

April 26, 2017accelerator adapter alacritech bus hba host iSCSI

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Is the Alacritech iSCSI Accelerator an iSCSI HBA (Host Bus Adapter)?

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No. A true iSCSI HBA appears to the operating system as a hard disk controller. iSCSI HBAs offload all storage processing from the host. Alacritech iSCSI Accelerators appear to the operating system a a NIC. iSCSI Accelerators only offload the network packet processing, and require a software initiator to handle the translation of the storage request into the iSCSI protocol. In general, it is the TCP packet processing that places the greatest load on the host, so an iSCSI accelerator provides the same essential benefit as an iSCSI HBA.