Administrator's Guide


Chapter 7. Defining Device Classes

A device class represents a device type that can be used by TSM. TSM uses the device class to determine which device and storage volume type to use to:

One device class can be associated with multiple storage pools. Each storage pool is associated with only one device class.

Each device class is characterized by its device type, which indicates the type of storage volumes that are used to store data. For random access storage, TSM supports only the DISK device class. The DISK device class is predefined by TSM. However, you can define many storage pools associated with the DISK device class.

For sequential access storage, TSM supports the following device types:

3570
IBM 3570 tape drives

3590
IBM 3590 tape drives

FILE
Storage volumes that are files in the file system of the server machine

GENERICTAPE
Tape drives supported by the HP-UX tape device driver

REMOVABLEFILE
Removable media devices (CDROM support)

SERVER
Storage volumes that are actually files archived in the server storage of another TSM server (a target server)

See the following sections:

Tasks:
"Defining and Updating Device Classes for Tape Devices"
"Defining and Updating FILE Device Classes"
"Defining and Updating Device Classes for REMOVABLEFILE Devices"
"Defining and Updating SERVER Device Classes"
"Requesting Information about a Device Class"
"Deleting a Device Class"

In this chapter, most examples illustrate how to perform tasks by using the TSM command line interface. For information about the TSM commands, see Administrator's Reference, or issue the HELP command from the command line of a TSM administrative client.

All of the TSM commands can be performed from the administrative Web interface. For more information about using the administrative interface, see Quick Start.


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