Defining a Cartridge 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.

Mount Limit

Enter the maximum number of sequential access volumes that can be simultaneously mounted for the device class.  Drives cannot be shared between device classes.  

The following are possible values:

value Specify the maximum number of drives used concurrently.  This value can be any number from 0 to 256. This value must never be allowed to exceed the number of drives that are defined and online in the library that services this device class. The default is 2.
0 The value of zero prevents new transactions from gaining access to the storage pool.

Mount Wait

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

Mount Retention

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

Tape Volume Prefix

Enter the high level qualifier of the file name that the server writes into the media labels. For each sequential access volume assigned to this device class, Tivoli Storage Manager uses this prefix to create the data set name.

Example: AB.CD2.E

Maximum Capacity

Enter the maximum amount of data Tivoli Storage Manager can store in the volumes categorized by this device class. This parameter is optional. Specify an integer followed by a scale factor.

Scale factors and their meanings are:

K Kilobyte. The default is 0.
M Megabyte
G Gigabyte

Estimated Capacity

Enter the estimated capacity for the volumes categorized by this device class. Specify an integer followed by a scale factor.

Scale factors and their meanings are:

K Kilobyte
M Megabyte
G Gigabyte

Expiration

Enter the expiration date that is placed on the tape labels for this device class, which are used for allocation. This parameter is optional. Possible values are:

yyddd Specifies the expiration date for this device class in YYDDD format.
yyyyddd Specifies the expiration date for this device class in YYYYDDD format.

Retention

Enter an integer between 1-9999 that defines the length of time, in days, to retain the tape. This parameter is optional.

Compression

Select whether devices in this device class should compress files.

Yes Specifies that the data for each tape volume is compressed. The default is Yes.
No Specifies that the data for each tape volume is not compressed.

Protection

Specify whether RACF, if installed, protects volumes assigned to this device class. If protection is provided, RACF profiles are created for the volumes. This parameter is optional.

Possible values for Protection:

No Specifies that RACF does not protect cartridge volumes assigned to this device class. The default is No.
Yes Specifies that RACF protects cartridge volumes assigned to this device class. RACF profiles are created for volumes when Tivoli Storage Manager first uses the volumes, but profiles are not deleted when volumes are deleted from Tivoli Storage Manager. Profiles will have to be manually deleted.
Automatic Specifies that RACF protects cartridge volumes assigned to this device class. RACF profiles are deleted when volumes are deleted from Tivoli Storage Manager.

If you specify automatic, volumes deleted from Tivoli Storage Manager will no longer be RACF-protected and the data on these volumes will be accessible by other users.

Unit

Enter an esoteric unit name, up to 8 characters, to specify a group of tape devices that support Cartridge System tape. This parameter is optional. The default is 3480.