Updating an ECartridge 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 an option. You must specify the exact drive type in the FORMAT
parameter. This drive type corresponds to the drives used by the storage agent
in an external library configuration.

Note: Actual capacities may vary depending on which cartridges and drives are used.

Format Description
DRIVE 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.

9840 Standard recording format with 270 meters (885 feet) of tape
9840C LZ-1 Enhanced (4:1) compacted recording format with 270 meters (885 feet) of tape
9940  Uncompressed (standard) format using a 60GB cartridge
9940B  Uncompressed (standard) format using a 200GB cartridge
9940C Compressed format using a 60GB cartridge
9940BC Compressed format using a 200GB cartridge
T9840C Uncompressed (standard) format using a 40GB cartridge
T9840C-C Compressed format using a 80GB cartridge

Library Name

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

Mount Limit

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

The following are possible values:

number The maximum number of drives used concurrently. This value can be any number from 0 to 256.       

This value must not be allowed to exceed the number of drives defined and online in the library.

0 The value of zero prevents new transactions from gaining access to the storage pool.

Mount Wait Period

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

Mount Retention Period

Enter a number, in minutes, for the maximum amount of time to retain an idle volume before dismounting it. This parameter is optional.

Maximum Capacity

Enter the maximum amount of data the server can store in the volumes categorized by this device class. This parameter is optional. The default is 0.

The value must be an integer followed by one of these units:

K Kilobyte.
M Megabyte
G Gigabyte

Estimated Capacity

Enter the estimated capacity for the volumes assigned to this device class. This parameter is optional. 

You can specify this parameter if the default estimated capacity for the device class is inaccurate due to compression of data.

The value must be an integer followed by one of these units:

K Kilobyte
M Megabyte
G Gigabyte

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

Expiration

Enter the expiration date that is placed on the tape labels for this device class, which are used for allocation. This parameter is optional. Enter the value as shown:

yyyyddd Specifies the expiration date for this device class in YYYYDDD format. For example, 2004007 signifies that expiration occurs on the seventh day of year 2004, or January 7, 2004. 

Retention

Enter an integer between 1-9999 that defines the length of time, in days, to retain the tape. This parameter is optional.

Protection

Specify whether RACF, if installed, protects volumes assigned to this device class. If protection is provided, RACF profiles are created for the volumes. This parameter is optional.

Possible values for Protection:

No Specifies that RACF does not protect cartridge volumes assigned to this device class. The default is No.
Yes Specifies that RACF protects cartridge volumes assigned to this device class. RACF profiles are created for volumes when the server first uses the volumes, but profiles are not deleted when volumes are deleted from the server. Profiles will have to be manually deleted.
Automatic Specifies that RACF protects cartridge volumes assigned to this device class. RACF profiles are deleted when volumes are deleted from the server.

If you specify automatic, volumes deleted from the server will no longer be RACF-protected and the data on these volumes will be accessible by other users.

Unit

Enter an esoteric unit name, up to 8 characters, to specify a group of tape devices that support ECartridge media. This parameter is optional.

Use the unit name that represents the subset of drives that are attached to z/OS in the library.