Hitachi Dynamic Link Manager Software GUI Help

5.2.3 Path List view in the view frame

The view frame area of the Path Management window displays one of the following two views:

Configuration view

Path List view

This subsection explains the window components in the Path List view.

The Path List view of the Path Management window displays the configuration, status, and utilization of paths. Figure 5-3 Display example of the Path List view shows a display example of the Path List view.

Figure 5-3 Display example of the Path List view

For details about how to display path information on the Path List view and the details about the Path List view, see (2) Viewing path information in the list format in 3.1.3 Viewing path information.

The following describes each window component:

Type:

In Type: you can select the type of path to be displayed. The selectable types are Owner path and Non-owner path.

For some storage subsystems, only the Owner path check box is active.

Owner path check box

Select Owner path to display owner paths.

Non-owner path check box

Select Non-owner path to display non-owner paths.

Status:

You use the following four check boxes to select the status of the paths to be displayed. By default, all check boxes are selected.

When you clear a Status: check box, the Path List view narrows down the items displayed.

Online path check box
When you select this check box, the Path List view displays the paths that have the Online or Online(P) status.

Offline path check box
When you select this check box, the Path List view displays the paths that have the Offline(C) status.

Offline (Error) path check box
When you select this check box, the Path List view displays the paths that have the Offline(E) or Offline(P) status.

Online (Error) path check box
When you select this check box, the Path List view displays the paths that have the Online(E) or Online(EP) status.

Note that the Status settings remain in effect even when you click the Configuration tab and switch to the Configuration view.

Online button

Clicking this button changes the status of a selected path (or paths) to Online.

When no path is displayed in the Path List view, or all the paths displayed in the Path List view are in the Online status and no path is selected, the Online button is displayed as inactive.

If you click this button without first selecting a path, or if you click this button after selecting only a line for which no path information is displayed, the Path List view changes the status of all paths that are not already Online to Online.

If you attempt to change the status of multiple paths to Online but the status of one of those paths cannot be changed, a message appears. To ignore the path whose status cannot be changed and to continue processing, click the OK button. To stop processing, click the Cancel button.

Offline button

Clicking this button changes the status of a selected path (or paths) to Offline(C).

In a cluster configuration, if a user selects a path whose status is Online and clicks the Offline button during reserve processing, the status of the selected path switches to Online(P), which indicates that the offline processing is in a waiting-to-execute state. Despite this change in status, however, the icon shown in the Status column does not change. After the reserve processing finishes and the offline processing executes, the path status will switch to Offline(C); however, the path information displayed in the Path List view will not be automatically updated. To display the most recent path status, click the Refresh button.

When no path is displayed in the Path List view, or no path is selected, the Offline button is displayed as inactive.

If you attempt to change the status of multiple paths to Offline(C) but one of those paths cannot be changed, a message appears. To ignore the path whose status cannot be changed and to continue processing, click the OK button. To stop processing, click the Cancel button.

Clear Data button

This button sets the I/O count and the number of I/O errors to 0 for all paths managed by HDLM.

Export CSV button

This button exports, to a CSV file, the information for the paths displayed in the Path List view. The default name for the CSV file is home-directory/pathlist.csv.

When no path is displayed in the Path List view, the Export CSV button is displayed as inactive.

Column headers

The column header for each column is a button. When you click the button, the path information is sorted using the information in the clicked header's column as the sorting key. A triangle is displayed on the far right of the header of the column used as the sorting key. Clicking the header button switches between sorting in ascending or descending order. When the sort is in ascending order, is displayed on the far right of the header. When the sort is in descending order, is displayed on the far right of the header.

Status

This column displays icons that indicate the path status.

The meanings of the icons displayed in the status column are described below:

Indicates that the path status is Online or Online(P). This means the active status.

Indicates that the path status is Offline(C). This means the offline status.

Indicates that the path status is Offline(E) or Offline(P). This means the failure-induced offline status.
If the intermittent error monitoring functionality is enabled, the icon flashes when an intermittent error occurs in the path.

Indicates that the path status is Online(E) or Online(EP). This means that an error occurred. If none of the paths accessing a device is in the Online status, one of the paths is changed to the Online(E) status. When the LU dynamic deletion functionality is used, the path whose status is Online(E) is deleted. Therefore it is not displayed.
If the intermittent error monitoring functionality is enabled, the icon flashes when an intermittent error occurs in the path.

If you sort the path information in ascending order of the path status values, the sort order is as shown below. By default, the path information is sorted in descending order of path status values.

Online or Online(P)

Offline(C)

Offline(E) or Offline(P)

Offline(E) (intermittent error)

Online(E) or Online(EP)

Online(E) (intermittent error)

Paths that are indicated by Offline(E), Offline(P), Online(E) or Online(EP) require corrective action. Take appropriate action according to 4.3 Actions taken for a path error.

Path ID

This column displays the AutoPATH_ID as a decimal number. The AutoPATH_IDs are re-assigned every time the host is restarted.

Path Name

The path name, which indicates a path. When you modify the system configuration or replace a hardware item, you should check the path names to identify the paths that will be affected by the change. A path name consists of the following four elements, separated by periods:

Host port number (hexadecimal number)

Bus number (hexadecimal number)

Target ID (hexadecimal number)

Host LU number (hexadecimal number)

Table 5-4 Elements of a path name shows the elements of a path name and their representation in Windows.

Table 5-4 Elements of a path name

Element Windows representation

Host port number (hexadecimal) (example: 0004, 0005) SCSI port number

Bus number (example: 0001) SCSI bus number

Target ID (example: 0000000000000000, 000000000000007A) Target Id

Host LU number(example: 0001) Logical Unit ID or LUN

The path name corresponds to the following information:

Information shown in the Computer Management window

The information in the following registry:
HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\Scsi

Note

When an FC connection is used, the target ID of a SCSI is determined based on the HBA configuration. For details on how to check the target ID, see the relevant documentation, such as the HBA manual.

Subsystem

This column displays the names of the corresponding storage subsystem to which each path is connected. You can use these names to specify the storage subsystem to be accessed via a path. A storage subsystem name consists of the following three elements, separated by periods:

Vendor ID: the name of the storage subsystem vendor

Model ID: indicates the model name of the storage subsystem

Serial number: the serial number of the storage subsystem

You can physically specify a storage subsystem by referencing these elements of information from the storage subsystem management program.

The displayed model ID is the same model ID that appears when you specify the -path -item parameter in the view operation of the HDLM command to display the non-summarized path information. For details on using the view operation of the HDLM command to check the path information, see the HDLM manual.

Emulation Type

The displayed emulation type is the same as the product ID of DskName that appears when you specify the -path parameter in the view operation of the HDLM command. For details on using the view operation of the HDLM command to check the path information, see the HDLM manual.

For command devices, "-CM" is added to the end of the product ID or the emulation type of the storage subsystem (for example, DF600F-CM).

LUN

This column displays the LU numbers within the storage subsystem. This number combined with the storage subsystem name (indicated in Subsystem) identifies the LU that is accessed by a path.

The displayed LUN is the same as iLU that appears when you specify the -path parameter in the view operation of the HDLM command. For details on using the view operation of the HDLM command to check the path information, see the HDLM manual.

SLPR

This column displays the SLPR number to which the LU belongs. A decimal value from 0 to 31 is displayed.

If the target LU exists in a storage subsystem where storage logical partition functionality is not supported, a hyphen (-) is displayed.

CHA

This column displays the port numbers of the channel adapter. This number identifies the CHA that is mounted on the storage subsystem.

You can physically specify a CHA by referencing this number from the storage subsystem management program.

CLPR

This column displays the CLPR number to which the CHA belongs. A decimal value from 0 to 31 is displayed. Note that a hyphen (-) is displayed if the following items are subject to display:

CHA ports in the storage subsystem that do not support cache logical partition functionality

Paths connected to the Snapshot Image of the Copy-on-write Snapshot of the Hitachi AMS2000/AMS/WMS/SMS series.

Type

This column displays the attributes of paths. Owner is displayed for an owner path, and Non-owner is displayed for a non-owner path.

For storage subsystems in which owner paths and non-owner paths are not distinguished, only Owner is displayed.

I/O Count

This column displays the total number (in decimal format) of I/O operations for the path.

To reset the I/O count value to zero, click the Data Clear button. Clicking the Data Clear button also resets the I/O error count value to zero.

I/O Errors

This column displays the total number (in decimal format) of I/O errors for the path.

To reset the I/O error count value to zero, click the Data Clear button. Clicking the Data Clear button also resets the I/O count value to zero.

Intermittent Error Path

Information about intermittent errors is displayed.

One of the following values is displayed for each path:

-
Indicates that intermittent error monitoring is not in effect, or the time is outside the period during which intermittent errors are monitored.

A value of at least 0
Indicates the number of errors that occurred during intermittent error monitoring.

*
Indicates that an intermittent error is occurring in the path, and that the path is excluded from being subject to automatic failback.

A hyphen (-) is displayed when the HDLM manager of the host is not running.

To select paths on which you want to perform an operation, use any of the following methods:

To select one line only, you can click the line that displays the information for the path you want to perform an operation on.

To select a range of lines, you can click the top and the bottom lines of the desired range while pressing the Shift key.

To select multiple lines, you can click the desired lines while pressing the Ctrl key.

To select a range of lines, you can drag the mouse over the lines.
Note that some paths might remain unselected depending on the speed of your mouse drag.

To release selection of a path, use either of the following methods:

To release all selected lines, click an empty line.

To release the selection of one line, click the line while pressing the Ctrl key.

Element	Windows representation
Host port number (hexadecimal) (example: 0004, 0005)	SCSI port number
Bus number (example: 0001)	SCSI bus number
Target ID (example: 0000000000000000, 000000000000007A)	Target Id
Host LU number(example: 0001)	Logical Unit ID or LUN

[Contents][Back][Next]

[Trademarks]