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

4.6.2 Deleting an LU dynamically

The LU deletion functionality automatically removes an LU from HDLM management when all the paths to that LU are disconnected.

You can set the LU deletion functionality by specifying the dlnkmgr command's set operation together with the -rmlu on parameter in the HDLM command. You can also set this functionality in the Options window of the HDLM GUI. For details on the Options window, or set operation, see 3.7.2 Setting the HDLM functionality by using the Options window and the set operation.

Organization of this subsection

(1) Requirements to delete the LU dynamically

(2) Checking that the LU or path is deleted dynamically

(3) Recovering the deleted LU or path

(1) Requirements to delete the LU dynamically

An LU is deleted when all the paths to that LU are disconnected. This means that an LU is deleted when HLU is deleted.

When using the dlnkmgr command's set operation to dynamically delete an LU, depending on the settings the following differences exist:

When the -rmlu on parameter is specified, the LU is not removed from HDLM management if the disconnected paths include a path in the Offline(C) status.

When the -rmlu on -force parameter is specified, the LU is removed from HDLM management even if the disconnected paths include a path in the Offline(C) status.

(2) Checking that the LU or path is deleted dynamically

This section explains the two operations for confirming that the LU or path is deleted by using the LU deletion functionality. One operation is performed when the user intentionally deletes an LU or path, and the other operation is performed when an LU or path is deleted because all the paths are disconnected.

When the user deletes the LU or path intentionally

Use the disk administrator, HDLM command, or HDLM GUI to confirm that LU or path has been deleted.

When an LU or path is deleted due to disconnection of a path

If an LU or path was deleted due to disconnection of a path, HDLM outputs the KAPL05301-E message to the event log.

Note

When an LU is deleted from the HDLM management target by using the LU deletion functionality, the KAPL08022-E message might not be output to the event log. In this case, refer to the KAPL05301-E message to check the path information.

Figure 4-5 An example of displaying the KAPL05301-E message shows the example of displaying the KAPL05301-E message.

Figure 4-5 An example of displaying the KAPL05301-E message

In the event viewer, the information about the deleted path is displayed in the format: PathID PathName DskName iLU ChaPort.

The following is an example of outputting data to the KAPL05301-E message.

Table 4-4 Items and descriptions for the path information, displayed in the KAPL05301-E message shows the items and descriptions for the path information, displayed in the KAPL05301-E message.

Table 4-4 Items and descriptions for the path information, displayed in the KAPL05301-E message

Item Description

PathID An AutoPATH_ID.

Host port number Elements of a PathName.

Bus number

Target ID

Host LU number

DskName The displayed contents differ depending on whether the HDLM management-target device is the Thunder 9200/9500V series, Lightning 9900/9900V series, TagmaStore, Universal Storage Platform V or a product other than these. For details, see Table 7-11 Displayed path information.

iLU

ChaPort

See the path information and check the LU that was deleted, and then take actions according to the path error. For details on how to take actions for the path error, see 5.3 Actions taken for a path error.

Item	Description
PathID	An AutoPATH_ID.
Host port number	Elements of a PathName.
Bus number
Target ID
Host LU number
DskName	The displayed contents differ depending on whether the HDLM management-target device is the Thunder 9200/9500V series, Lightning 9900/9900V series, TagmaStore, Universal Storage Platform V or a product other than these. For details, see Table 7-11 Displayed path information.
iLU
ChaPort

(3) Recovering the deleted LU or path

To restore the deleted LU, recover it from physical failure and then perform the operations below. For a path error, remove the cause of the path error and then perform the following. Note that sometimes they are automatically recovered without performing the following operations.

In the Device Manager window of Windows, select Disk drives and then click Scan for hardware changes.

In the Disk Management window of Windows, click Rescan Disks.

[Contents][Back][Next]

[Trademarks]