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
         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
         6.3.3         Port Addressing for Controllers in Multibus Mode
     6.4     Parallel SCSI Multipath Configurations
         6.4.1         Transparent Failover
         6.4.2         Multibus Failover and Multiple Paths
         6.4.3         Configurations Using Multiported Storage Controllers
     6.5     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
                Displaying Paths With SHOW DEVICE/FULL
                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
         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 Fibre Channel
     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 Volume Shadowing for OpenVMS
         7.2.4         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
                Fibre Channel Storage Adapter Names
                Fibre Channel Path Names
                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
                Tape and Medium Changer Device Names
                Use of Worldwide Identifiers (WWIDs)
                File-Based Device Naming
         7.5.3         New Commands and Features for Fibre Channel Tape Devices
         7.5.4         Configuring a Fibre Channel Tape Device
                Basic Configuration Steps: Summary
                Basic Configuration Steps: Details
         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         Serving a Fibre Channel Tape Device
         7.5.8         Replacing a Fibre Channel Tape Device
         7.5.9         Determining the Physical Location of a Fibre Channel Tape Device
         7.5.10         Accessing a Fibre Channel Tape Device in a Standalone Environment
         7.5.11         Using an MDR with Dual Fibre Ports
     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 an HSG for Use with OpenVMS
         7.7.1         Setting a Dual HSG to Multibus Failover Mode
         7.7.2         Setting an HSG to SCSI-3 Mode
         7.7.3         Setting the Device Identifier for the CCL
         7.7.4         Setting the HSG Port Parameters
         7.7.5         Setting Up Logical Units on the HSG
         7.7.6         Configuring the HSG Host Connections
     7.8     Creating a Cluster with a Shared FC System Disk
     7.9     Online Reconfiguration

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