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Restoring from Several Parallel Media with Continuation Media

Interactive Procedure:

1. Select the restore action.

2. Select the parallel medium.

3. Check the entries.

4. Start the restore operation.

5. Mount the continuation media and continue the restore operation.

Steps 1 to 4 are the same as for restoring from several parallel media without continuation media.

When the number of media to be loaded is larger than the number of parallel tape devices available, restoring is somewhat more complicated than described in Section Restoring from Several Parallel Media without Continuation Media. In contrast to the backup, the number of media to be loaded is known for the recovery. Therefore, you are not compelled to specify the correct number of media. But the handling of the mounting of tapes will be easier if the correct number of media is specified.

After selecting the medium named "tapes_4" as the medium to be used for Backup / Restore / Data, CONTROL displays the following screen:

3. Check the Entries

Enter the number of media to be loaded as the number of media. The parameter is important now, because the number of parallel tape devices is not sufficient to simultaneously load all the media. For tapes selected as media, you must now mount the tapes to the tape devices if this has not been done yet, because otherwise the recovery will fail. Then confirm the list of media.

After clicking on the Ok button, CONTROL displays the label information just loaded for each medium, for security reasons. These labels (in the example, for the first four tapes: DATA_A0_A to DATA_A0_D) should be identical to the text contained on the stickers of the tapes.

Example of the label information of the first tape:

4. Start the Restore Operation

Confirm each screen with the Ok button (or the key); otherwise CONTROL cancels the restore action. The restore operation is started by clicking on the Ok button (or by pressing the key) in the last label screen.

During the restore operation, CONTROL displays an increasing bar to indicate the progress of the recovery.

As the number of parallel tape devices is not sufficient for the number of tapes to be loaded, CONTROL expects continuation media in this case.

5. Mount the Continuation Media and Continue the Restore Operation

If the medium is a tape, simply mount the next tape. If the medium is a file, you can specify the path name of the next file, after pressing the key. You can also select another type for the next medium.

The restore operation is continued with the Ok button.

Step 5 must be repeated as often as is needed to terminate the recovery or until it is canceled.

In the "device", "type", and "label" fields, the screen shows the specifications valid for the previous medium. After pressing the key, the "device" and "type" fields are updatable.

Here, the Ignore button has the effect that the tape device will be ignored and all the tapes to be mounted are immediately expected from the remaining tape devices. This can be useful, for example, if you only want to load the tapes from particular tape devices and no longer from all parallel devices defined.

Batch Call:

No batch call is provided for restoring from parallel media with continuation media. We recommend to use external backup tools or autoloaders in this case.


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