Intel EK-KZPCM-UG manual Digital OpenVMS Installation, Digital OpenVMS Driver Description

5

DIGITAL OpenVMS Installation

This chapter describes briefly the DIGITAL OpenVMS driver that enables the KZPCM Host Adaper to work with the DIGITAL OpenVMS operating system, and tells you how to install the driver in the host computer.

5.1DIGITAL OpenVMS Driver Description

NOTE

The minimum DIGITAL OpenVMS version for the

KZPCM Host Adapter is version 7.1-1H1.

The DIGITAL OpenVMS driver enables the use of Ultra SCSI disks to maximize the PCI-based Alpha system I/O throughput and storage capacity. The driver is optimized for minimum load on the system processor by use of a loadable SCRIPT to handle low-level SCSI operations and minimize the number of inter- rupt requests to the system. In the case of small I/Os, the DIGITAL OpenVMS driver interrupts the host only once for each I/O, compared with several inter- rupts per I/O for other SCSI adapters. The Ultra SCSI VMS driver features sup- port for:

∙Ultra SCSI at speeds up to 40 Mb/sec per channel.

∙Synchronous negotiation (including Fast/Ultra SCSI).

∙Single-interrupt-per-small-I/O technology for maximum I/O throughput with minimum CPU overhead.

∙Up to 15 disks per channel.

∙Boot and Install

∙Wide negotiation

∙Tagged command queuing

∙Multiple Logical Unit Numbers (LUNs)

∙Disconnect/Reselect

∙Scatter-gather

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