Creating FC-connected or iSCSI-connected LUNs or disks

The Windows host sees LUNs on your storage system as virtual disks. You can use SnapCenter to create and configure an FC-connected or iSCSI-connected LUN.

Before you begin

About this task

Steps

  1. In the left navigation pane, click Hosts.
  2. In the Hosts page, click Disks.
  3. Select the host from the Host drop-down list.
  4. Click New.
    The Create Disk wizard opens.
  5. On the LUN Name page, identify the LUN:
    In this field... Do this...
    Storage System Select the SVM for the LUN.
    LUN path Click Browse to select the full path of the folder containing the LUN.
    LUN name Enter the name of the LUN.
    Cluster size Select the LUN block allocation size for the cluster. Cluster size depends upon the operating system and applications.
    LUN label Optionally, enter descriptive text for the LUN.
  6. On the Disk Type page, select the disk type:
    Select... If...
    Dedicated disk The LUN can be accessed by only one host. Ignore the Resource Group field.
    Shared disk The LUN is shared by hosts in a Windows Server failover cluster. Enter the name of the cluster resource group in the Resource Group field.

    You need only create the disk on one host in the failover cluster.

    Cluster Shared Volume (CSV) The LUN is shared by hosts in a Windows Server failover cluster that uses CSV. Enter the name of the cluster resource group in the Resource Group field.

    Make sure that the host on which you are creating the disk is the owner of the cluster group.

  7. On the Drive Properties page, specify the drive properties:
    Property Description
    Auto assign mount point SnapCenter automatically assigns a volume mount point based on the system drive. For example, if your system drive is C:, auto assign creates a volume mount point under your C: drive (C:\scmnpt\).

    Auto assign is not supported for shared disks.

    Assign drive letter Mount the disk to the drive you select in the adjoining drop-down list.
    Use volume mount point Mount the disk to the drive path you specify in the adjoining field.

    The root of the volume mount point must be owned by the host on which you are creating the disk.

    Do not assign drive letter or volume mount point Choose this option if you prefer to mount the disk manually in Windows.
    LUN size Specify the LUN size; 150 MB minimum. Select MB, GB, or TB in the adjoining drop-down list.
    Use thin provisioning for the volume hosting this LUN Thin provision the LUN. Thin provisioning allocates only as much storage space as is needed at one time, allowing the LUN to grow efficiently to the maximum available capacity.

    Make sure there is enough space available on the volume to accommodate all the LUN storage you think you will need.

    Choose partition type Select GPT partition for a GUID Partition Table, or MBR partition for a Master Boot Record.

    MBR partitions might cause misalignment issues in Windows Server failover clusters.

  8. On the Map LUN page, select the iSCSI or FC initiator on the host:
    In this field... Do this...
    Host Double-click the cluster group name to display a drop-down list that shows the hosts that belong to the cluster and then select the host for the initiator.

    This field is displayed only if the LUN is shared by hosts in a Windows Server failover cluster.

    Choose host initiator Select Fibre Channel or iSCSI and then select the initiator on the host. You can select multiple FC initiators if you are using FC with multipath I/O (MPIO).
  9. On the Group Type page, specify whether you want to map an existing igroup to the LUN, or create a new igroup:
    Select... If...
    Create new igroup for selected initiators You want to create a new igroup for the selected initiators.
    Choose an existing igroup or specify a new igroup for selected initiators You want to specify an existing igroup for the selected initiators, or create a new igroup with the name you specify. Type the igroup name in the igroup name field. Type the first few letters of the existing igroup name to autocomplete the field.
  10. On the Summary page, review your selections and click Finish.
    SnapCenter creates the LUN and connects it to the specified drive or drive path on the host.