Updating a 8mm Device Class

To update a device class, first complete the following fields and then click Finish, or click Cancel to end the task.

Recording Format

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.
8200 Specifies that ADSM writes data using the 8200 recording format. This results in a tape capacity of 2.3GB when using standard 112M tape cartridges.
8200C Specifies that ADSM writes data using the 8200C recording format. This results in a tape capacity of approximately 2.3GB when using standard 112 meter tape cartridges. This format, however, uses the tape drive's hardware compression feature, so the actual capacity may be greater than 2.3GB, depending on the effectiveness of the compression feature.
8500 Specifies that ADSM writes data using the 8500 recording format. This results in a tape capacity of 5.0GB when using standard 112M tape cartridges.
8500C Specifies that ADSM writes data using the 8500C recording format. This results in a tape capacity of at least 5.0GB when using standard 112M tape cartridges. However, this format uses the tape drive's hardware compression feature, so the actual capacity of the cartridge may be greater than 5.0GB, depending on the effectiveness of the compression feature.
8900 Specifies that ADSM writes data using the 8900 recording format. This results in a tape capacity of 5.0GB when using standard 112M tape cartridges.
AIT Specifies that ADSM writes data using the AIT recording format. This results in a tape capacity of at least 25.0GB when using Sony's T3N cartridges.
AITC Specifies that ADSM writes data using the AITC recording format. This results in a tape capacity of at least 60.0GB when using Sony's T3N cartridges. This format uses the tape drive's hardware compression feature, so the actual capacity of the cartridge may be greater than 60.0GB, depending on the effectiveness of the compression.

Library Name

Select the name of the library that contains the 8mm tape drives used by this device class.

Mount Limit

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.

Mount Retention

Enter the amount of time, in minutes, to retain an idle volume before dismounting it.

Tape Volume Prefix

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

Estimated Capacity

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

Mount Wait

Enter the maximum length of time, in minutes, to wait for a volume to be mounted in a manual library.