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.
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. |
DLT10 | Specifies that ADSM writes data using the DLT10 recording format. This results in a tape capacity of approximately 10.0GB when using CompacTape III or CompacTape IV cartridges. |
DLT10C | Specifies that ADSM writes data using the DLT10C recording format. This results in a tape capacity of approximately 20.0GB when using CompacTape III and CompacTape IV cartridges. This format, however, uses the tape drive's hardware compression feature, so the actual capacity may be greater than 20.0GB, depending on the effectiveness of the compression feature. |
DLT15 | Specifies that ADSM writes data using the DLT15 recording format. This results in a tape capacity of approximately 15.0GB when using CompacTape III or CompacTape IV cartridges. |
DLT15C | Specifies that ADSM writes data using the DLT15C recording format. This results in a tape capacity of approximately 30.0GB when using CompacTape III or CompacTape IV cartridges. This format, however, uses the tape drive's hardware compression feature, so the actual capacity may be greater than 30.0GB, depending on the effectiveness of the compression feature. |
DLT20 | Specifies that ADSM writes data using the DLT20 recording format. This results in a tape capacity of approximately 20.0GB when using CompacTape IV cartridges. |
DLT20C | Specifies that ADSM writes data using the DLT20C recording format. This results in a tape capacity of approximately 40.0GB when using CompacTape IV cartridges. This format, however, uses the tape drive's hardware compression feature, so the actual capacity of the cartridge may be greater than 40.0GB, depending on the effectiveness of the compression feature. |
DLT35 | Specifies that ADSM writes data using the DLT35 recording format. This results in a tape capacity of approximately 35.0GB when using CompacTape IV cartridges. |
DLT35C | Specifies that ADSM writes data using the DLT35C recording format. This results in a tape capacity of approximately 70.0GB when using CompacTape IV cartridges. This format, however, uses the tape drive's hardware compression feature, so the actual capacity of the cartridge may be greater than 70.0GB, depending on the effectiveness of the compression feature. |
Select the name of the library that contains the DLT tape drives used by this device class.
Enter the maximum number of volumes that can be simultaneously mounted for the device class.
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 | 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.