Spanning tapes or drives

YoYotta will span or split up large archives across multiple tapes.
In this example there are two LTO drives and a main and safety copy is needed. So twice as many tapes will be needed.
However the same applies to creating a single spanned copy using one drive.
If spanning across tapes the job will be running for a while, so best to use direct attached fast source storage.
Turn off Quick Verify in Preferences as a full verify is needed when spanning tapes.
A spanned copy from a live volume (where files are being added/modified) is not supported. See the LTFS FAQ support page for more information.
If using an LTO library the tapes for the job must ALL be loaded into library slots. So the maximum job size is limited to the library capacity. You will need to split up larger jobs.

Select first main and safety tapes

Click Add COPY #1,2. In this example all our main tapes have odd serial numbers and safety tape numbers are even.


Ready to start

Now two jobs are ready. COPY #1 is the main and COPY #2 will be the safety copy.
There are 10 files to copy, the first three will fit onto each tape. Click the green button to start.


Backup space warning

YoYotta warns that the entire job will not fit on one tape. Click Continue.


More space needed

After the copy and verify, more space is needed, so YoYotta prompts to add new destinations.


Add second Main tape

Select the first tape TP0001 and press the eject button in the top right. Repeat this for tape TP0002.
Important, don't delete the first tapes from the destination table, just eject them. They will show as NOT MOUNTED.
Once a spanned job has started it is important not to open Edit Paths.

Select COPY #1 in the main window, then open the Add Backup panel. Select tape TP0003 and click Append to COPY #1. This adds a new tape to the main copy.


Add second Safety tape


Select COPY #2 in the main window, then open the Add Backup panel. Select tape TP0004 and click Append to COPY #2. This adds a new tape to the safety copy.


Second tapes ready

Click the green arrow to start the job.
Before starting make sure that you see the Copied and Verified count for the previous tapes as shown here.


Second tapes complete

Now tapes are complete. There are some files left to copy. Eject the tapes and mount two more and start.


All finished

Now there is a green confirmation tick for COPY #1 and COPY #2. Eject the last two tapes.


YoYotta Automation

If you have an LTO tape library then you can load all the tapes at once and use YoYotta Automation to create an automated job.


Resuming a spanned job

If there is a power issue or the drives are disconnected during a job or any of the destinations are removed from the GUI by mistake,
then the copied and verified status will be lost.
Once a spanned job has started it is important not to open Edit Paths.
Also make sure that you do NOT have Quick Verify turned on in Preferences as spanning tapes needs full verification.


If this happens then the job can be resumed by following these steps.

If any tapes have the wrong data then reformat them first.
Load and mount the first tape for each destination. Add to COPY #1 if not already there.
Make sure the destination paths are set exactly the same as the previous job.
Click the refresh button above the job table.
Make sure that you see the number of files copied and verified.
Load and mount the next tapes. Append to COPY #1 and then click refresh. Again ensure you see the Copied and Verified count.
Repeat this for any further tapes and then click start.
YoYotta will check the tapes and resume copying.


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