To define a device class, first complete the following fields and then click Finish, or click Cancel to end the task.
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.
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 volume before dismounting it.
Enter the maximum amount of data the server can store in the volumes categorized by this device class. This parameter is optional.
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. Specify an integer followed by a scale factor.
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.
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. |
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. |
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. |
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 Cartridge System tape. This parameter is optional.