Defining a Removable File Device Class

To define a device class, first complete the following fields and then click Finish, or click Cancel to end the task.

Device Class Name

Enter the name of the device class to be defined. The maximum length of the device class name is 30 characters.

Library Name

Select the library name that contains the removable media drives used by this device class.

Maximum Capacity

Enter the maximum size of any volumes (which are actually files) defined to a storage pool categorized by this device class.

The default maximum capacity is the space remaining on the media after it is first used. Because the server opens only one file per physical removable medium, specify a capacity that enables one file to make full use of your media capacity.

The value must be an integer followed by one of these units:

K Kilobyte
M Megabyte
G Gigabyte

Mount Limit

Enter the maximum number of volumes that can be simultaneously mounted for the device class. The default is Drives.

The following are possible values:

Drives Specifies that the server determines the mount limit based on the number of drives defined and online in the library.
number Specifies 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.

For external libraries, specify the number of drives for the library.

0 The value of zero prevents new transactions from gaining access to the storage pool.

Mount Retention Period

Enter the amount of time, in minutes, to retain an idle volume before dismounting it.

Mount Wait Period

Enter the maximum length of time, in minutes, to wait for a volume to be mounted.