Updating an LTO Device Class

To update a linear tape open (LTO) 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.

Note: If this format uses the tape drive hardware compression feature, depending on the effectiveness of compression, the actual capacity may be greater than the listed value.

Format Estimated Capacity Description
Drive Determined by drive capacity. The server selects the highest format that can be supported by the drive on which a volume is mounted.

Avoid specifying DRIVE when a mixture of drives is used within the same library.

For example, do not use this option for a library containing some drives that support recording formats superior to other drives.

ULTRIUM 100.0GB Uncompressed format, using ULTRIUM cartridges.
ULTRIUMC See note above.

200.0GB

Compressed format, using ULTRIUM cartridges.
ULTRIUM2 200GB Uncompressed (standard) format using a 200GB cartridge.
ULTRIUM2C See note above. 400GB Compressed format using a 200GB cartridge.

When migrating from Ultrium to Ultrium 2 devices, follow one of the following procedures:

Note: The server supports the mixing of LTO Ultrium Generation 1 drives and media with LTO Ultrium Generation 2 drives and media because the LTO Ultrium Generation 2 drives can read and write to Generation 1 media.

Library Name

Select the name of the defined library object that contains the tape drives used by this device class.

Mount Limit

Enter the maximum number of volumes that can be simultaneously mounted for the device class.

Mount Retention Period

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, the server 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 one of these units:

K Kilobyte
M Megabyte
G Gigabyte

For more information on the default estimated capacity, see the Recording Format heading.

Mount Wait Period

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