To define a device class, first complete the following fields and then click Finish, or click Cancel to end the task.
Enter the name of the device class to be defined. The maximum length of the device class name is 30 characters.
Select an option. This parameter is optional. The default is Drive.
Note: Actual capacities may vary depending on which cartridges and drives are used.
Format | Estimated Capacity | Description |
Drive | Determined by drive capacity. | The server selects the highest format that is supported by the drive on which
a volume is mounted.
Avoid specifying DRIVE when a mixture of drives is used within the same library. For example, do not use this option for a library containing some drives that support recording formats superior to other drives. |
18T | 180MB |
18-track basic recording format (read-only) |
18TC | See note above. 180MB | 18-track extended, compacted recording format (read-only) |
36T | 360MB | 36-track extended recording format (R/W) |
36TC | See note above. 360MB | 36-track extended, compacted recording format (R/W) |
SD3A | 10GB | Standard recording format - 'A' cartridge with 91 meters (298 feet) of tape |
SD3AC | See note above. 10GB | Compacted recording format - 'A' cartridge with 91 meters (298 feet) of tape |
SD3B | 25GB | Standard recording format - 'B' cartridge with 204 meters (668 feet) of tape |
SD3BC | See note above. 25GB | Compacted recording format - 'B' cartridge with 204 meters (668 feet) of tape |
SD3C | 50GB | Standard recording format - 'B' cartridge with 392 meters (1286 feet) of tape |
SD3CC | See note above. 50GB | Compacted recording format - 'B' cartridge with 392 meters (1286 feet) of tape |
9840 | 20GB | Standard recording format with 270 meters (885 feet) of tape |
9840C | See note above. 80GB | LZ-1 Enhanced (4:1) compacted recording format with 270 meters (885 feet) of tape |
9940 | 60GB | Uncompressed (standard) format using a 60GB cartridge |
9940C | See note above. 120GB | Compressed format using a 60GB cartridge |
9940B | 200GB | Uncompressed (standard) format using a 200GB cartridge |
9940BC | See note above. 400GB | Compressed format using a 200GB cartridge |
Select the name of the defined library object that contains the E-Cartridge Tape drives used by this device class.
Enter the maximum number of volumes that can be simultaneously mounted for the device class. The default is Drives.
Note: For external libraries, specify the number of drives for the library. Do not use the Drives default.
The following are possible values:
Drives | The server determines the mount limit based on the number of drives defined and online in the library. |
number | The maximum number
of drives used concurrently. This value can be any number from 0 to 256.
This value must not be allowed to exceed the number of drives defined and online in the library. |
0 | The value of zero prevents new transactions from gaining access to the storage pool. |
Enter a number, in minutes, for the maximum amount of time to retain an idle volume before dismounting it. This parameter is optional.
Enter the high level qualifier of the file name that the server writes into the sequential access media labels. This parameter is optional. For each sequential access volume assigned to this device class, the server uses this parameter to create the data set name.
Enter the estimated capacity for the volumes assigned to this device class. This parameter is optional.
You can specify this parameter if the default estimated capacity for the device class is inaccurate due to compression of data.
The value must be an integer followed by one of these units:
K | Kilobyte |
M | Megabyte |
G | Gigabyte |
For more information on the default estimated capacity, see the Recording Format heading.
Enter a number for the maximum length of time, in minutes, to wait for a volume to be mounted.