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A device class represents a device type that can be used by Tivoli Storage Manager. Tivoli Storage Manager uses the device class to determine which device and storage volume type to use to:
Each storage pool is associated with only one device class. When a new device class is defined, its device type must be specified to indicate the type of storage volumes used to store data.
For random access storage, Tivoli Storage Manager provides the DISK device class, which is already defined. You can define many storage pools that are categorized by the DISK device class. Although you can mix disk devices in a DISK storage pool, you should consider performance requirements for restoring or retrieving files. For example, if users need immediate access to certain files, you could define a DISK storage pool, which consists of only 3390 DASD to ensure that these files reside on faster speed devices.
For sequential access storage, Tivoli Storage Manager supports the following device types:
Tivoli Storage Manager provides a predefined device class named CARTRIDGE, which has the device type of CARTRIDGE. You can modify this device class and define additional device classes for sequential access devices.
See the following sections:
In this chapter, most examples illustrate how to perform tasks by using a Tivoli Storage Manager command-line interface. For information about the commands, see Administrator's Reference, or issue the HELP command from the command line of a Tivoli Storage Manager administrative client.
Tivoli Storage Manager tasks can also be performed from the administrative Web interface. For more information about using the administrative interface, see Quick Start.