Connecting to a LUN

You can connect your SnapDrive for Windows host to a LUN using the Connect Disk wizard in the SnapDrive MMC snap-in.

Steps

1. Under SnapDrive in the left MMC pane, select the instance of SnapDrive you want to manage. Then, select Disks.
2. From the menu choices at the top of MMC, navigate to Action > Connect Disk.
3. In the Connect Disk wizard, click Next.
4. In the Provide a Storage System Name, LUN Path and Name panel, perform the following actions:
   1. In the “Storage System Name” field, type the storage system name where the LUN will be connected, or choose a storage system from the drop-down list.
   2. In the “LUN Path” field, type the path to the LUN. Alternatively, click Browse and navigate to the LUN you want to connect.
   3. Click Next.
5. In the Select a LUN Type panel, perform the following actions.

   If the LUN...	Then...
   Will belong to a single system	Select Dedicated, and then click Next.
   Will become a Windows cluster resource	Select Shared and click Next. Then, in the Information about the Microsoft Cluster Services System panel, verify that you want the disk to be shared by the nodes listed and click Next.

6. In the Select LUN Properties panel, perform the following actions:
   1. Either select a drive from the list of available drive letters, or enter a mount point for the LUN you are connecting. When you create a volume mount point, enter the drive path that the mounted drive will use: for example, G:\mount_drive1\.
      Note: The root volume of a new mount point must be owned by the node on which you are creating the new disk.
      Note: You can create cascading volume mount points (by mounting one mount point on another mount point); however, in the case of a cascading mount point created on a MSCS shared disk, you might receive a system event warning indicating that disk dependencies might not be correctly set. This is not the case, however, and the mounted disks will function as expected.

   2. Click Next.
7. In the Select Initiators panel, choose an initiator for the LUN.
   Note: If MPIO is installed on the system, you can select multiple FCP initiator ports or one iSCSI session.

   If the LUN...	Then...
   Will belong to a single system	Select at least one initiator for the LUN you are creating from the list of available initiators, and then click Next.
   Will be a Windows cluster resource	Double-click the cluster name to display the hosts that belong to the cluster. Click the name of a host to select it. Select at least one initiator for the LUN you are creating from the list of available initiators on that host. Repeat steps b and c for all hosts in the cluster. Click Next. Note: The Next button remains unavailable until initiators for all hosts of a cluster are selected.

8. In the Select Initiator Group Management panel, specify whether you will use automatic or manual igroup management.

   If you select automatic igroup management, SnapDrive uses existing igroups or, when necessary, creates new igroups for the initiators you've specified. If you select manual igroup management, you manually choose existing igroups or create new ones as needed.

   If you specify...	Then...
   Automatic igroup management	Select Automatic, and then click Next.
   Manual igroup management	Select Manual, click Next, and then, in the Select Initiator Groups panel, perform ONE of the following actions: Select from the list the igroups to which you want the LUN to belong. Repeat this action for each node in the cluster, then click Next. Note: A LUN can be mapped to an initiator only once. Click Manage igroups, and for each new igroup you want to create, type a name in the Igroup Name text box, select initiators, and click Create. Then, click Finish to return to the Select Initiator Groups panel, and click Next. Note: The Next button in the Select Initiator Groups panel remains unavailable until the collection of selected igroups contains all the initiators you previously selected for use.

9. If the LUN is a dedicated disk, go to the next step; otherwise, if the LUN is a Windows cluster resource, perform the following steps in the Specify Microsoft Cluster Services Group panel.
   1. Perform ONE of the following actions to select a cluster group to which the connected LUN will belong.
      • Select a cluster group from the Group Name drop-down list.
      • Select Create a new cluster group to create a new cluster group.
      Note: If you are creating a volume mount point, cluster group of the root volume is already selected.

   2. Click Next.
10. In the Completing the Connect Disk Wizard panel, perform the following actions:
    1. Verify all the settings.
    2. If you need to change any settings, click Back to go back to the previous wizard panels.
    3. Click Finish.

    The Computer Management window is displayed, with the newly connected LUN now appearing under SnapDrive > Disks in the left panel.