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 the recording format to be used when writing data to media.
Drive | Specifies that ADSM selects the highest format that can be supported by the drive on which a volume is mounted. The default is Drive. |
3570B | Specifies that ADSM writes data using the basic (uncompressed) format. This results in a tape capacity of approximately 5GB. |
3570C | Specifies that ADSM writes data using the compressed format. This results in a tape capacity of approximately 5GB. This format, however, uses the tape drive's hardware compression feature, so the actual capacity may be greater, depending on the effectiveness of compression. |
Select the name of the library that contains the tape drives used by this device class.
Enter the maximum number of volumes that can be simultaneously mounted for the device class. The value must be an integer in the range of 0 to 256.
Possible values for Mount Limit:
Drives | Specifies that ADSM determines the mount limit based on the number of drives defined and online in the library. The default is Drives. For external libraries you should not use the value of Drives. You need to specify the number of drives for the library as the Mountlimit value. |
Mount limitvalue | Specifies the maximum number of drives used concurrently in this device class by ADSM. 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 amount of time, in minutes, to retain an idle volume before dismounting it..
Enter the high level qualifier of the file name that the server writes into the media labels. For each volume assigned to this device class, ADSM uses this prefix to create the data set name.
Example: AB.CD2.E
Enter the estimated capacity for the volumes assigned to this device class. You do not need to specify an estimated capacity unless the drives perform data compression, or you have volumes of nonstandard size. The value must be an integer followed by a scale factor.
Scale factors and their meanings are:
K | Kilobyte |
M | Megabyte |
G | Gigabyte |
Enter the maximum length of time, in minutes, to wait for a volume to be mounted in a manual library.