To update a device class, first complete the following fields and then click Finish, or click Cancel to end the task.
Select the recording format to be used when writing data to volumes in this device class.
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. |
DDS1 | Specifies that ADSM writes data using the DDS-1 recording format for 4mm tapes, without compression. This format results in an uncompressed cartridge capacity of 1.3GB on 60 meter tape or 2GB on 90 meter tape. This format only applies to 60 and 90 meter tapes. |
DDS1C | Specifies that ADSM writes data using the DDS-1 recording format for 4mm tapes, with compression enabled. This results in a cartridge capacity of approximately 1.3GB on a 60 meter tape or 2GB on a 90 meter tape. This format, however, uses the tape drive hardware compression feature, so the actual capacity may be greater, depending on the effectiveness of compression. This format only applies to 60 and 90 meter tapes. |
DDS2 | Specifies that ADSM writes data using the DDS-2 recording format for 4mm tapes, without compression. This format results in a cartridge capacity of 4GB on 120 meter tape. This format only applies to 120 meter tape. |
DDS2C | Specifies that ADSM writes data using the DDS-2 recording format for 4mm tapes, with compression. This format results in a cartridge capacity of approximately 8GB on 120 meter tape. This format, however, uses the tape drive hardware compression feature, so the actual capacity may be greater, depending on the effectiveness of compression. This format only applies to 120 meter tape. |
DDS3 | Specifies that ADSM writes data using the DDS-3 recording format for 4mm tapes, without compression. This format results in a cartridge capacity of 12GB on 125 meter tape. This format only applies to 125 meter tape. |
DDS3C | Specifies that ADSM writes data using the DDS-3 recording format for 4mm tapes, with compression. This format results in a cartridge capacity of approximately 24GB on 125 meter tape. This format, however, uses the tape drive hardware compression feature, so the actual capacity may be greater, depending on the effectiveness of compression. This format only applies to 125 meter tape. |
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.
Possible values for Mount Limit are:
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 default 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 in the Prefix field. 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.