To define a device class, first complete the following fields and then click Finish, or click Cancel to end the task.
Note: The Tivoli Storage Manager server supports 256KB data blocks when writing to 3590 tape drives. Verify that your hardware supports this capability. If your hardware does not support 256KB data blocks, you may need to add the server option NOLONG.
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.
Notes:
Format | Description |
3590B | Uncompressed (basic) format |
3590C | Compressed format |
3590E-B | Uncompressed (basic) format |
3590E-C | Compressed format |
3590H-B | Uncompressed (basic) format |
3590H-C | Compressed format |
Select the name of the defined library object that contains the tape drives used by this device class.
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:
number | Specify the maximum number
of drives used concurrently. This value can be any number from 0 to 256.
The default is 2.
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. |
0 | The value of zero prevents new transactions from gaining access to the storage pool. |
Enter the maximum length of time, in minutes, to wait for a volume to be mounted.
Enter the amount of time, in minutes, to retain an idle sequential before dismounting it.
Enter the high level qualifier of the file name that the server writes into the sequential access media labels. For each sequential access volume assigned to this device class, the server uses this prefix to create the data set name.
Enter the maximum amount of data the server can store in the volumes categorized by this device class. This parameter is optional. The default is 0.
The value must be an integer followed by one of these units:
K | Kilobyte. |
M | Megabyte |
G | Gigabyte |
Enter the estimated capacity for the volumes categorized by this device class. This parameter is optional. The default estimated capacity is 9GB.
Note: This value is ignored if you specify a value other than 0 in the Maximum Capacity field. If the server uses the value specified in the Estimated Capacity field, this value does not determine the amount of data stored on the volume, but only determines the usage before the volume is filled. After a volume is full, the actual amount of data stored on the tape is used for these calculations.
The value must be an integer followed by one of these units:
K | Kilobyte |
M | Megabyte |
G | Gigabyte |
Enter the expiration date that is placed on the tape labels for this device class, which are used for allocation. This parameter is optional. Enter the value as shown:
yyyyddd | Specifies the expiration date for this device class in YYYYDDD format. For example, 2004007 signifies that expiration occurs on the seventh day of year 2004, or January 7, 2004. |
Enter an integer between 1-9999 that defines the length of time, in days, to retain the tape. This parameter is optional.
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. |
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 the server first uses the volumes, but profiles are not deleted when volumes are deleted from the server. 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 the server. If you specify automatic, volumes deleted from the server will no longer be RACF-protected and the data on these volumes will be accessible by other users. |
Enter an esoteric unit name, up to 8 characters, to specify a group of tape devices that support 3590 System tape. This parameter is optional. The default is 3590.
For LAN-free configuration, use the unit name that represents the subset of
drives that are attached to z/OS in the library.