Setting Restore Default Source Options

Use Restore Options to choose a data compression algorithm, to choose data encryption, and to override the default maximum number of devices available to .

To check the default restore source options or edit default restore source options:

1. Open the Configure Defaults window by selecting Configure from the Function Tab bar and clicking Defaults.

2. Expand the Restore options.

3. Click the Source icon or name to select it. The selection is indicated by the selection check box next to the option icon, and the Restore Source Options dialog appears.

4. Optionally enter or revise each field:

Data Compression

Compresses data prior to network transmission.

Select Yes to compress data prior to transmission at the node being backed up. This setting is recommended if there is processing power available on the client nodes and network bandwidth is limited. This setting minimizes the impact of data transmission on data lines.

Or, select No to disable the data compression.

• Tape EOJ Usage Determines what to do with the tape when the backup job is complete.

Rewind Tapes	For a standalone tape device, this option rewinds the tape and leaves it in the drive. For a tape library tape drive, this option rewinds, unloads, and returns the tape to its slot.
Unload Tapes	For a standalone tape device, this option rewinds the tape and ejects it from the drive. For a tape library tape drive, this option rewinds, unloads, and returns the tape to its slot. For DiskDirectory, this option causes empty volsers to be used before new volsers.
Leave Tapes	For both standalone and tape library tape drives, this option leaves the tape wound to the point where the job ended and leaves it in the drive. The next job attempts to use the tape in the drive instead of mounting a new tape. In the case of standalone drive, if the currently mounted tape is unacceptable (for example, if the next backup requires a tape from a different media pool), the operator is prompted to mount another tape. In the case of a tape library, if the tape in the drive is rejected for any reason, it unloads the tape, returns it to its slot, and proceed to select another tape.

• Max Devices (Devices) Limits the number of storage devices valid for use with this job. Use this option if you want to stop DPX from using all the drives in the selected device cluster so that some drives will be available for other purposes.

• Tape Mount Attempts : Attempts

  Determines the maximum number of times to check a tape drive for a tape (for standalone tape devices only).

• Tape Mount Attempts : Intervals

  Determines how long to wait (in seconds) between attempts.

Early Device Release

Controls tape drive usage.

Select Yes to release the tape drive after the current task with a tape drive finishes so that the next job can use the same tape drive before completing the entire job.

Or, select No so as not to make the tape drive available for the next job until the entire job completes.

• Data Transfer Auto Cancel Interval (Minutes)

  This option comes into play if a job does not get an indication of “active” status during the data transfer phase of the job. initiates job cancellation after this interval, in minutes, has lapsed.