DEC-StorageWorksHSJ40-ArrayController

The Digital StorageWorks HSJ40 Array Controller is an intelligent storage server designed for VAX and Alpha AXP OpenVMS Clusters, providing precise levels of performance and availability for Computer Interconnect (CI) environments.

Key Features and Benefits:

• Performance: Achieves up to 1,100 I/O requests/second (single controller) or 2,200 (dual controllers) with a peak bandwidth of 4 MB/s. It includes a 16 MB read cache, expandable to 32 MB, and supports controller-based RAID 0 (disk striping) for load balancing.
• Availability: Offers high availability through dual-path support, allowing drives to be accessed by either of two controllers to eliminate single points of failure. It supports host-based RAID 1 (Volume Shadowing) and redundant power supplies.
• Flexibility & Expandability: Integrates a broad range of industry-standard SCSI-2 devices (disks, tape, CDROM) with the CI. Its modular design allows users to scale performance and capacity up to 36 storage devices across six SCSI-2 ports, adapting to changing business needs.
• Integration & Compatibility: Seamlessly integrates with Digital's HSC servers and is fully compliant with Digital Storage Architecture (DSA), ensuring reliable data transmission within cluster environments. It supports OpenVMS VAX 5.5-1 or higher and OpenVMS AXP 1.5.
• Cost-Effective: Enables the building of high-end storage subsystems using affordable, standard SCSI-2 devices, offering investment protection through easy integration and expansion.
• Ease of Use: Pre-configured solutions simplify setup, and its "plug-and-play" design makes adding new storage capacity straightforward.

In essence, the HSJ40 controller provides a robust, flexible, and high-performance storage solution for Digital's CI clusters, allowing users to optimize storage for various applications with a focus on both data speed and continuous availability.