Compaq ProLiant Cluster HA/F500 Administrator Guide

Secure Path Installation Procedures
ProLiant Cluster HA/F500 for MA8000 Administrator Guide 4-17
COMPAQ CONFIDENTIAL
Writer: Woody Jernigan File Name: e-ch4
Codename: Chargers Part Number: 355220-006 Last Saved On: 7/26/02 2:52 PM
Defining a Persistent Secure Path Storage Subsystem Drive
Configuration
When the primary path for a drive is changed using the Manager, the preferred path
assignment for the corresponding storage unit on the storage subsystem does not
change. If the preferred path is not changed to the new path, the unit reverts to its
original preferred path if both the storage subsystem and host server are power cycled
together. To make the primary path assignment persistent for those drives you have
reassigned with the Manager, reset the preferred path attribute for the corresponding
storage unit on the storage subsystem.
1. Use the CLI command
show units to show the preferred path settings for all
units. This command also indicates which controller each storageset is currently
online with (“this” or “other”).
2. Next, use the CLI command
set unit# preferred=this_controller or
set unit# preferred=other_controller to change the preferred path
attribute to the appropriate path. For instance, if a storage unit is reported as
being “online to other controller” but is preferred to “this” controller, you should
change the preferred path attribute to the “other” controller.
3. Repeat this procedure for each storage unit that is online to a path that is not its
preferred path. It is not necessary to restart the server or storage subsystem to
perform this procedure.
Automatic Failover
When a path fails (Secure Path software detects the loss of drive I/O due to adapter,
cable, or controller malfunction), the Secure Path software will:
• Perform an automatic failover and move the affected drives to the alternate path.
• Log failover events in the operating system Event Log.
• Report the path failure through a Windows pop-up message.
• Reflect the reassignment of the drives to the failover path on the display.
NOTE: Check the operating system Event Log or entries generated by the Secure Path
software to help determine which component of the path has malfunctioned. Look for
entries by the HszDisk and RaiDisk drivers.