Setting a UUID

The Storage Administrator (Provisioning) role is required to perform this task.

You can set an arbitrary ID to identify a logical volume from the host using LUN Manager when host mode option 33 is set to on. The ID is referred to as the UUID (user-definable LUN identifier) and is typically composed of a Prefix and an Initial Number.

Note the following when setting a UUID:

• If host mode 05 OpenVMS is used, the host mode option 33 is set to ON, LUs that do not have UUID settings are inaccessible.

• If host mode 05 OpenVMS is used with host mode option 33 set to OFF, LUs that have UUID settings are inaccessible.

The following rules apply to setting a UUID:

• These characters cannot be used for UUID: \ / : , ; * ? " < > |

• A space character cannot be used as the first or the last character of a UUID.

• UUID is case-sensitive. For example, Abc and abc are different UUIDs.

To keep track of device information, create a correspondence table similar to the example in Correspondence table for defining devices.

To set a UUID:

1. Perform one of the following to display the Ports / Host Groups / iSCSI Targets window.

For Command Suite:

• On the Resource tab, expand the Storage Systems tree. On the target storage system, click Port / Host Group.

For Storage Navigator:

• Expand the Storage Systems tree and select Ports / Hosts Groups / iSCSI Targets.

2. Select the port.

The host group that correspond to the port appear.

3. Select the host group.

Information about the selected host group appears on the right side of the window.

4. Select the LUNs tab.

Information about LU paths associated with the selected host group appears.

5. Select one or more logical units to which volumes are assigned (if a volume is assigned to an LU, the columns on the right of the LUN column are not empty).

When multiple LUs are selected, the same UUID is set to all selected LUs.

6. Click More Actions, then select Edit UUIDs.

7. In the Edit UUIDs window, in Prefix, type the UUID.

If a UUID is already specified, you can change it. The UUID before changing appears in UUID in the Edit UUIDs window. However, if multiple LUs, or N/As are selected, the Prefix box is blank.

For an OpenVMS server host, enter a UUID composed of a Prefix and an Initial Number. The Prefix can include up to 5 digits, from 1 to 32767, and the Initial Number can include up to 5 digits, from 0 to 32767.

For a server host other than OpenVMS, enter a UUID composed of a Prefix and an Initial Number. The Prefix can include up to 64 ASCII characters (letters, numerals and symbols) and the Initial Number can include up to 9 digits.

When changing the server host OS from HP-UX to Open VMS, or from Open VMS to HP-UX, the same UUID cannot be used continuously. Clear the UUID setting (see Clearing a UUID setting), then set the proper UUID for a server host.

8. To sequentially number the UUIDs, type the first digit in the Initial Number box. The following rules apply to the Initial Number:

1: Up to 9 numbers are added (1, 2, 3, ... 9).
08: Up to 92 numbers are added (08, 09, 10, ... 99).
If the host mode is set to OpenVMS, the numbers are as follows:
8, 9, 10, ... 99
23: Up to 77 numbers are added (23, 24, 25, ... 99).

9. Click Finish.

10. In the Confirm window, confirm the settings, in Task Name type a unique name for this task or accept the default, then click Apply.

If Go to tasks window for status is checked, the Tasks window opens.