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Restoring from Several Parallel Media without Continuation Media

Interactive Procedure:

1. Select the restore action.

2. Select the parallel medium.

3. Check the entries.

4. Start the restore operation.

1. Select the Restore Action (Example: Backup / Restore / Data)

Select one of the restore actions "data", "updated pages" up to "log" from the Backup / Restore menu item.

The list of defined media appears.

2. Select the Medium

The medium defined with the parallel-id ("tapes_4" in the example) must be selected from the list of defined media.

Usually, you will use the same media as for the save action. But it is also possible to restore a save in parallel that was written to a medium with continuation media.

The maximum number of media that can be defined parallel to each other is restricted by the kernel parameter MAXBACKUPDEVS. Should it become necessary to change this parameter, the serverdb must be stopped and restarted to bring the parameter into effect.

For tapes selected as media, you must now mount the tape to the tape device if this has not been done yet, because otherwise the recovery will fail. Then you can confirm the media screens.

The list of parallel media is displayed again in a separate screen.

3. Check the Entries

In addition to the list of media, the screen shows how many tapes were used for the preceding backup of this kind. Here, you should specify the number of tapes that make up the save to be restored.

The parameter is only important when the number of tapes is larger than the number of parallel media available. Therefore, this parameter is described in detail in Section Restoring from Several Parallel Media with Continuation Media.

Confirm the medium definition with Ok or . To cancel the restore operation, use the Cancel button.

As for the backup for each medium, a screen appears containing the content of the label stored on the medium. In the example, these labels are "data_a0_a", "data_a0_b", "data_a0_c", and "data_a0_d".

4. Start the Restore Operation

Each screen must be confirmed with the Ok button (or the key); otherwise CONTROL cancels the restore operation. To start the recovery, click on the Ok button (or press the key) in the last label screen. The result protocol is displayed after the recovery.

Example of the last page of the result protocol. Here, you can see the label of the fourth medium and the restore operation with the specification of the four media.

Batch Call:

Syntax:

Example:

xrestore -a SAVEDATA -d mydb -m TAPES_4

The complete description of the batch calls is included in Section Batch Mode: xbackup / xrestore.

To display the protocol file of the batch call, you can use the Backup / Show Protocol menu function.


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