7.8 Sharing Devices

Storage devices that exist in a storage area network (SAN) can be shared by multiple servers in a cluster. For more information about clustering, see the following:

IMPORTANT:The system hardware does not specify disk drives to come up automatically as Shareable for Clustering or Not Shareable for Clustering. You must manually set this value for each device, according to the configuration of your storage system.

Making a device shareable enables device sharing for those devices in high-availability clusters that you want to be part of a shared-disk storage solution. If the Shareable for Clustering option is enabled (selected), the selected storage device can be shared by multiple computers in a cluster.

Selected Box Indicates a Device Is Shareable for Clustering

Marking a device as shareable for clustering sets all of the pools on this device to shareable.If any of these pools span multiple devices, you must make sure that each device is set to the same share state as this one, or the device can become unusable.

If this device is a member of a software RAID device, marking a device as shareable for clustering also sets all the other member devices as shareable for clustering.

7.8.1 Planning for Device Sharing

  • Do not assign a device as Shareable for Clustering if it is not capable of being shareable.

  • If you create a pool that spans multiple storage devices, each of the member devices in that pool must either be marked as Shareable for Clustering or as Not Shareable for Clustering.

  • The system pool and all of its member devices cannot be marked as Shareable for Clustering.

  • Devices that contain Traditional partitions and volumes cannot be marked as Shareable for Clustering.

  • If you assign partitions to a software RAID device, all the devices for those member partitions must either be marked as Shareable for Clustering or as Not Shareable for Clustering.

7.8.2 Configuring the Device’s Share State

  1. In iManager, click Storage>Devices.

    For instructions, see Section 3.1.6, Accessing Roles and Tasks in iManager.

  2. Select a server to manage.

    For instructions, see Section 3.1.7, Selecting a Server to Manage.

    When the page refreshes, a list of devices appears in the Devices list.

  3. In the Devices list, select a device.

    After the page refreshes, information about the selected device appears in the Devices list.

  4. Depending on the current state of the device:

    • To set a device’s share state to On, select the Shareable for Clustering check box, then click Apply or click OK.

    • To set a device’s share state to Off, deselect the Shareable for Clustering check box, then click Apply or click OK.

    If you click Apply, iManager saves the change and remains on the device page. If you click OK, iManager saves the change and takes you to the main Storage page. If you do not click Apply or OK, the setting is not implemented; the device remains not shareable.