Use this command to define a new database volume. All database volumes reside on random access You can have TSM create the volume before it is assigned.Before issuing this command, you must allocate and format the volume using the ANRFMT job or the ANRFMT2 job found the SAMPLIB dataset. For information on using these jobs, see Administrator's Guide.
Attention: Do not change the size of a database volume after you have defined it to TSM. If you change the size, by using external operating system utilities, TSM may not initialize correctly and you could lose data.
When you define a new database volume, you provide additional space to the database. To permit the database to use this additional space, use the EXTEND DB command.
A database volume must be at least 5MB. TSM uses 1MB of each database volume for overhead. For example, if you define a 9MB database volume, 8MB are available for storage.
Privilege Class
To issue this command, you must have system privilege or unrestricted storage privilege.
Syntax
>>-DEFine DBVolume--volume_name--------------------------------><
Parameters
For VSAM linear data sets, specify a standard VSAM cluster name. A VSAM cluster name consists of one or more qualifiers that are separated by periods. The length of each qualifier is from 1 to 8 alphanumeric characters. The maximum length of the cluster name is 42 characters. An example is ADSM.BFS.POOL2.VOLA.
Examples
Task 1
Create a database volume named COY.ADSM.DBVOL.
Related Commands
Table 44. Commands Related to DEFINE DBVOLUME
Command | Description |
---|---|
DEFINE DBCOPY | Creates a volume copy of a database volume. |
DELETE DBVOLUME | Deletes a volume from the database. |
EXTEND DB | Extends usable database storage within the volumes previously allocated for its use. |
QUERY DBVOLUME | Displays information database volumes. |