Installation guide

Chapter 1. Theory of Operation
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Secure Path also incorporates the custom Windows NT class driver, HszDisk, developed
for use with StorageWorks RAID Array controllers. This class driver provides unique
error handling features and performance enhancements not available in the native
Windows NT disk class driver.
Multiple-bus management is implemented using Secure Path Manager. Secure Path
Manager is a client/server graphical application that continuously monitors the multiple-
bus storage environment and automatically updates the displayed configuration
information. Secure Path Manager indicates which path is currently servicing each
configured storage unit. Online, offline, and pending state information for available
storage units and paths is depicted using color codes. The capability to swap storage units
between paths is also provided through simple “drag-and-drop” operations.
1.4 Installation and Configuration
A single host Secure Path configuration is comprised of a server, two host bus adapters, a
StorageWorks RAID Array subsystem, and two sets of cables. A Secure Path single
server configuration is shown in Figure 1-1.
A Microsoft Cluster Secure Path configuration is comprised of two servers, two host bus
adapters in each server, a StorageWorks RAID Array subsystem, and two sets of cables.
A Secure Path Microsoft Cluster configuration is shown in Figure 1-2.
All Secure Path software components are installed on either Intel or Alpha based
platforms using the same InstallShield based setup utility. The setup procedure requires
that a standard single path configuration be established, with all storage units defined,
prior to installation of the Secure Path software. The Secure Path software is then
installed on the single path configuration before re-configuration of the storage controllers
for multiple-bus mode and installation of hardware for the redundant path. This software-
first/hardware-second procedure allows the operating system to properly configure the
multiple-bus environment when rebooted.
For previously installed subsystems, no modifications are required to existing storage
units or data volumes.