The examples below illustrate use of the job validation feature.
Example 1
Scenario
On Monday, you create an EVM job, backup_inventory, that replicates units D4 and D5 and then runs a tape backup. Unit D4 contains the western region inventory and D5 contains the eastern region inventory.
When you create the job, EVM analyzes the storage configuration and determines that disks named DISK60300 and DISK60400 could be used for the BCVs and saves the configuration data. (This detailed data is not visible to you.) Then, on Tuesday, another EVM job or another operation uses and retains control of DISK60300.
On Wednesday, you browse to the EVM Jobs View page and validate the backup_inventory job before running it. When EVM begins the validation, it sees that one of the disks required for the BCVs is not available and immediately looks for a replacement. If a replacement is available, EVM assigns it to the backup_inventory job and indicates that the job can be run.
Solution
In this case, EVM handles the resource problem and no additional action is required on your part before you run the job.
Example 2
Scenario
On Monday, you create an EVM job, backup_inventory, as described above. Then, on Tuesday, someone deletes unit D5 and puts the eastern region data on unit D10.
On Wednesday, you browse to the EVM Jobs View page and validate the backup_inventory job before running it. When you do this, EVM indicates that the job is not valid because one of the resources (source unit D5) no longer exists.
Solution
In this case, the EVM validation feature alerts you, but it cannot reconstruct the job to meet your objectives. At this point, you must determine the best course of action.
If you know that unit D5 will be available again, and with the data you need, and when you need it, you could wait and run the job later.
If that is not the case, you will need to create a new EVM job that includes the units you need (D4 and D10). If you are certain that the backup_inventory job (with units D4 and D5) will never be valid again, you can delete it first and then create the new job using the same name.