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HP OpenVMS Systems Documentation
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Guidelines for OpenVMS Cluster Configurations
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Chapter 6
6 Configuring Multiple Paths to SCSI and Fibre Channel Storage
     6.1     Overview of Multipath SCSI Support
         6.1.1         Direct SCSI to Direct SCSI Failover
         6.1.2         Direct SCSI to MSCP Served Failover (Disks Only)
         6.1.3         Configurations Combining Both Types of Multipath Failover
     6.2     Configuration Requirements and Restrictions
     6.3     HSx Failover Modes
         6.3.1         Transparent Failover Mode
         6.3.2         Multibus Failover Mode (Disks Only)
         6.3.3         Port Addressing for Controllers in Multibus Mode
     6.4     Parallel SCSI Multipath Configurations (Disks Only)
         6.4.1         Transparent Failover
         6.4.2         Multibus Failover and Multiple Paths
         6.4.3         Configurations Using Multiported Storage Controllers
     6.5     Disk Device Naming for Parallel SCSI Multipath Configurations
         6.5.1         Review of Node Allocation Classes
         6.5.2         Review of Port Allocation Classes
         6.5.3         Device Naming Using HSZ Allocation Classes
     6.6     Fibre Channel Multipath Configurations
     6.7     Implementing Multipath Configurations
         6.7.1         Valid Multipath Configurations
         6.7.2         Invalid Multipath Configuration
         6.7.3         Multipath System Parameters
         6.7.4         Path Identifiers
         6.7.5         Displaying Paths
             6.7.5.1             Displaying Paths With SHOW DEVICE/FULL
             6.7.5.2             Displaying Paths With SHOW DEVICE/MULTIPATH_SET
         6.7.6         Path Polling
         6.7.7         Switching Current Paths Manually
         6.7.8         Path Selection by OpenVMS
         6.7.9         How OpenVMS Performs Multipath Failover
         6.7.10         Automatic Failback to a Direct Path (Disks Only)
         6.7.11         Enabling or Disabling Paths as Path Switch Candidates
         6.7.12         Performance Considerations
         6.7.13         Console Considerations
Chapter 7
7 Configuring Fibre Channel as an OpenVMS Cluster Storage Interconnect
     7.1     Overview of OpenVMS Fibre Channel Support
     7.2     Fibre Channel Configuration Support
         7.2.1         Fibre Channel Remedial Kits
         7.2.2         Mixed-Version and Mixed-Architecture Cluster Support
         7.2.3         Fibre Channel and OpenVMS Galaxy Configurations
     7.3     Example Configurations
         7.3.1         Single Host with Dual-Ported Storage
         7.3.2         Multiple Hosts With One Dual-Ported Storage Controller
         7.3.3         Multiple Hosts With Storage Controller Redundancy
         7.3.4         Multiple Hosts With Multiple Independent Switches
         7.3.5         Multiple Hosts With Dual Fabrics
         7.3.6         Multiple Hosts With Larger Fabrics
     7.4     Fibre Channel Addresses, WWIDs, and Device Names
         7.4.1         Fibre Channel Addresses and WWIDs
         7.4.2         OpenVMS Names for Fibre Channel Devices
             7.4.2.1             Fibre Channel Storage Adapter Names
             7.4.2.2             Fibre Channel Path Names
             7.4.2.3             Fibre Channel Disk Device Identification
     7.5     Fibre Channel Tape Support (Alpha)
         7.5.1         Minimum Hardware Configuration
         7.5.2         Overview of Fibre Channel Tape Device Naming
             7.5.2.1             Tape and Medium Changer Device Names
             7.5.2.2             Use of Worldwide Identifiers (WWIDs)
             7.5.2.3             File-Based Device Naming
         7.5.3         Management Support for Fibre Channel Tape Devices
         7.5.4         Configuring a Fibre Channel Tape Device
             7.5.4.1             Basic Configuration Steps: Summary
             7.5.4.2             Basic Configuration Steps: Details
             7.5.4.3             Creating User-Specified Device Names
         7.5.5         Changing the Name of an Existing Fibre Channel Tape Device
         7.5.6         Moving a Physical Tape Device on Fibre Channel
         7.5.7         Swapping Out an NSR on Fibre Channel
         7.5.8         Serving a Fibre Channel Tape Device
         7.5.9         Replacing a Fibre Channel Tape Device
         7.5.10         Determining the Physical Location of a Fibre Channel Tape Device
         7.5.11         Accessing a Fibre Channel Tape Device in a Standalone Environment
         7.5.12         Using an NSR or MDR with Dual Fibre Ports Prior to Version 7.3-1
         7.5.13         Multipath Tape Support
     7.6     Using the AlphaServer Console for Configuring FC
         7.6.1         Viewing the FC Configuration from the Console
         7.6.2         Setting Up FC Disks for Booting and Dumping
     7.7     Setting Up a Storage Controller for Use with OpenVMS
         7.7.1         Setting Up the Device Identifier for the CCL
         7.7.2         Setting Up the Device Identifier for Disk Devices
     7.8     Creating a Cluster with a Shared FC System Disk
     7.9     Online Reconfiguration
     7.10     HSG Host Connection Table and Devices Not Configured
     7.11     Using Interrupt Coalescing for I/O Performance Gains
     7.12     Using Fast Path in Your Configuration
     7.13     FIBRE_SCAN Utility for Displaying Device Information

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