HiCommand Dynamic Link Manager User's Guide (for Windows(R))

5.3.1 Using the HDLM GUI to handle a path error

The following shows the procedure using the HDLM GUI to handle a path error.

Organization of this subsection

(1) Examine the messages

(2) Obtain path information

(3) Identify the error path

(4) Narrow down the hardware that may have caused the error

(5) Identify the error location and correct any hardware error

(6) Place the path online

(1) Examine the messages

Examine the message that is output to the event log in the host for monitoring messages. If the KAPL08022-E message is output, view that message to check the path in which the error occurs. For details on the message, see 5.2 Checking error information in messages.

If an error occurred in all the paths to the LU, the KAPL08022-E message appears, in addition to the KAPL08026-E message.

If you delete all the paths when using the LU dynamic deletion functionality, the KAPL05301-E message appears.

(2) Obtain path information

Obtain path information to narrow down the hardware in which the error occurred.

To view path information:

Start the Path Management window.
The Path List view appears.
For details on how to display the Path Management window, see (1) Displaying the Path Management window in 4.2.2 Displaying or closing the Path Management window.

(3) Identify the error path

Check the path information displayed in the Path List view to identify the error path. In the Status column, the error path has the status (Offline(E) or Offline(P)) or (Online(E) or Online(EP)).

If the intermittent error monitoring functionality is enabled, the icon flashes when an intermittent error occurs in the path (The icon lights for 3 seconds and then goes out for 0.2 seconds, repeatedly).

(4) Narrow down the hardware that may have caused the error

Check the value displayed in the Subsystem, LUN, and CHA columns for the error path to narrow down the hardware that may be the cause of the error. To physically identify the hardware corresponding to Subsystem, LUN, and CHA, use the information provided by the storage-subsystem management program.

(5) Identify the error location and correct any hardware error

Use the Windows and hardware management tools to identify the error location, and then take appropriate, corrective action. If an error occurs in the path, HDLM outputs an error message to the event log of the host. Information about the path in which the error occurred is also output to the event log. For hardware maintenance, contact your hardware vendor or maintenance company if there is a maintenance contract.

(6) Place the path online

After the path recovers from the error, use the Path Management window to place online the path that went offline due to the error.

To place the offline paths online:

Display the Path Management window.

Make sure that no path is selected in the Configuration view or Path List view, and then click the Online button.
All offline paths that are displayed in the Configuration view or the Path List view are placed online.
If any path cannot be placed online due to an error, the KAPL02022-W message appears. To ignore such paths and to continue processing, click the OK button. To cancel the processing, click the Cancel button.
Check the status of the paths that cannot be placed online, and take appropriate, corrective action.

Close the Path Management window.
For details on how to close the Path Management window, see (2) Closing the Path Management window in 4.2.2 Displaying or closing the Path Management window.

Note

Even if you select the paths in the Offline(E) status in the Path Management window and click the Online button, some paths may not be placed online. In this case, use the Path Management window to change those paths from the Offline(E) status to the Offline(C) status. Then, place the paths online. The system automatically checks whether the target paths are available, puts available paths into the Online status, and puts unavailable paths into the Offline(E) status. The paths in the Offline(E) status have not recovered from an error yet. Take corrective action for the error, and then use the Path Management window to place the paths online again.

If path errors occur on all of the paths, and some or all of the paths are recognized by Windows, disk numbers might then be changed from the ones that were assigned when the host started. If this happens, restarting the host will cause the disk numbers to be changed back to the ones that were assigned when the host started . After the disk numbers have changed back, use VERITAS Backup Exec for Windows or the Intelligent Disaster Recovery functionality of VERITAS NetBackup.

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