Administrator's Guide


Example of Setting Up Two 3490E Drives

For the following example, two 3490E drives are attached to MVS and configured to the operating system. The example takes you through the steps necessary to get TSM to use the devices for storing client data.

This example presents the procedure with a minimum of customization. If you want to do more, see the references in the steps for more details.

Define the Tivoli Storage Manager Objects

  1. Classify drives according to type and format by defining TSM device classes. For example, if you want to use the 3490C recording format, use the following command:
    define devclass tap3490_class devtype=cartridge -
    format=3490c mountlimit=2
    
    Key choice:Mount limit (number of drives available in this device class) has a default value of 2. The mount limit should be equal to the number of drives of the same type that are available to TSM.

  2. Check the server option DELETIONEXIT if necessary. For information on the deletion exit, see Setting Up Tape Installation-Wide Exits. For information on server options, see Administrator's Reference.

  3. Set up the storage pool to use the devices in the device class you just defined. For example:
    define stgpool tap3490_pool tap3490_class maxscratch=20
    

    Key choices:

    1. If you specify zero (0) for the maximum number of scratch volumes, you must explicitly define each volume to be used in the storage pool. If you allow scratch volumes by specifying a number greater than zero, TSM can choose from the scratch volumes available, without action on your part.

    2. Collocation is turned off by default. Collocation is a process by which the server attempts to keep all files belonging to a client node or a client file space on a minimal number of volumes. Once clients begin storing data in a storage pool with collocation off, you cannot easily change the data in the storage pool so that it is collocated. To understand the advantages and disadvantages of collocation, see Grouping Client Files: Collocation on Sequential Access Storage Pools and How Collocation Affects Reclamation.

    See Defining or Updating Primary Storage Pools.

Update Tivoli Storage Manager Policy

Do one or both of the following to update TSM policy:

Clients Back Up Directly to Tape

You can choose to have clients back up directly to the new tape storage pool that you defined.

Key choice:If you back up to tape directly, the number of clients that can back up data at the same time is equal to the number of drives available to the storage pool (through the device class). If you have only one drive, only one client at a time can back up data.

  1. Update the default copy group so that the destination for backups is the new tape storage pool. For example:
    update copygroup standard standard standard standard -
    type=backup destination=tap3490_pool
    
    Note:Instead of updating the default copy group in the STANDARD policy domain, you could define a new management class and a new copy group.

    See Defining and Updating a Backup Copy Group.

  2. Activate this modified policy:
    activate policyset standard
    

    See Activating a Policy Set.

Clients Back Up to Disk Then Data Migrates

Have clients back up data to disk storage, then let TSM migrate the data to the new tape storage pool when the amount of disk storage used reaches the migration threshold. For example, you can have data migrate from the default disk storage pool, BACKUPPOOL, by using the following command:

update stgpool backuppool nextstgpool=tap3490_pool

See Migration for Disk Storage Pools.

Register Clients to the Policy Domain

If you updated the default STANDARD policy to use the new storage pool as a destination for backups from clients, the clients must be registered to that policy domain. To register a client to the STANDARD policy domain, enter this command:

register node astro cadet

For information on options when registering clients, see Registering Nodes with the Server.


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