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EK–KZPCM–UG. B01 6–1
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.
6.1 DIGITAL 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.