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

6

DIGITAL UNIX Installation

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

6.1DIGITAL UNIX Driver Description

DIGITAL UNIX is Digital Equipment Corporation’s Alpha system UNIX operating system. The DIGITAL UNIX 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(s) by use of a loadable SCRIPT to handle low-level SCSI operations and minimize the number of interrupt requests to the system. For the case of small I/Os, the driver interrupts the host only once for each I/O, compared with several interrupts per I/O for other types of SCSI adapters.

The DIGITAL UNIX driver features support for:

∙Ultra SCSI at speeds up to 40 Mbytes/second per channel.

∙Synchronous negotiation (including Fast/Ultra SCSI)

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

∙Simple installation via setld command.

∙Version 4.0D or later.

∙Wide negotiation

∙Tagged command queuing.

∙Multiple Logical Unit Numbers (LUNs).

∙Disconnect/Reconnect.

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