When should the Clear host ID option be used during the import of a Storage Foundation (tm) for Windows (SFW) Dynamic Disk group?

Below is some information about the Disk Group Host ID inconjunction with the Clear host ID option:

When a dynamic diskgroup is created or imported, all disks in the dynamic disk group are stamped with the computer's host ID. Typically, a dynamic disk group cannot be imported if any of its disks are stamped with a non-matching host ID. This mechanism provides a check in cases when disks can be accessed from more than one host.

If a dynamic disk group is in use by one machine when another machine attempts to import this dynamic disk group, the import will fail because the host IDs of these two machines are different.

To move a dynamic diskgroup from one machine to another when the dynamic disk group was not cleanly deported (for example, if the host computer crashed), the Clear host ID option must be specified to clear the original host ID and stamp a new host ID onto the dynamic diskgroup when it is imported

The Clear host ID option should be used only when it is known that the dynamic disk group is not imported on another host. If a dynamic disk group is imported on two or more hosts at one time, data corruption can occur resulting in the need of restoring the data from a good known state.

To import a dynamic disk group with the Clear host ID option in the Veritas Enterprise Administrator (VEA), perform the following procedure:
1. Right-click the dynamic disk group> Import
2. Select the check box for Clear host ID
3. Select OK

To import a dynamic disk group with the Clear host ID option from the command prompt, perform the below command:
1. Start > Run >cmd
2. vxdg -g<Disk_Group_Name>-C import where <Disk_Group_Name> is the name of the dynamic disk group to be imported