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Define device classes to support the different tape devices, tape recording technologies, and storage media available to Tivoli Storage Manager.
Define additional tape device classes (with 3590 or CARTRIDGE device type) when your physical environment consists of different types of tape drives and storage media. However, do not mix devices that cannot read and write to the same media.
When defining tape device classes, consider:
Each tape device class is uniquely identified by its device class name and is characterized by its device type. Tivoli Storage Manager provides two tape device types: 3590 and CARTRIDGE. Examples of tape devices that support cartridge tape include the 3490 or 3480 Magnetic Tape Subsystems.
Do not mix non-compatible tape devices in a CARTRIDGE device class. For example, do not mix 3480 devices with 3490E devices because the server might not be able to satisfy a tape mount request to restore user data as demonstrated by the following scenario:
The device type of CARTRIDGE is not the same as the predefined device class of CARTRIDGE. The CARTRIDGE device class has a device type of CARTRIDGE. You can have many different CARTRIDGE device classes with the device type of CARTRIDGE.
For example, based on the example introduced in Mapping Storage Pools to Device Classes and Devices, you could define two device classes named 36TRACK and
18TRACK with the CARTRIDGE device type as shown in Table 7.
Table 7. Naming CARTRIDGE Device Classes
Device Class Name | Device Type | Description |
---|---|---|
36TRACK | CARTRIDGE | Supports Cartridge System Tape volumes used with 3490E tape devices |
18TRACK | CARTRIDGE | Supports Cartridge System Tape volumes used with 3480 or 3490 Base tape devices |
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