Netbackup - update volume configuration error

There is probably a barcode mis-match.

NBU identifies tapes at a physical level by barcode, it then assigns a media ID and for the most part uses the media ID to reference the tape.

I suspect the barcode displayed by the library has changed.

The thing to understand, is that NBU does not ever inventory a library by looking to see where the tapes are in the library.  Instead it 'asks' the library where the tapes are - the result is the same, but how it gets there is very different.

Consider this :

Media generation ID rule = First six characters of barcode

Library display 8 charactors of barcode

Barcose / Media ID

AA1234L5  /  AA1234

Then the library changes and now only displays the first six characters

AA1234 / AA1234

The result is the media ID would be the same, but the barcode is different.  As the barcode is different NBU recognises this as a new tape, but when it trys to add it into NBU it find the media ID already there, but for a different barcode, hence 'media ID not unique'.

What to do.

Find a tape in the media section of the GUI, write down the slot number, maedia ID and barcode.

Run robtest from the robot control host, and then run the robtest command

s s

Find the tape you wrote down, and see what the barcode is, does it match what you wrote down.

(Exit robtest)

I suspect it will be different.

To correct.

Either - change the robot config (on the robot) to display the barcode the same way as before (so the barcode you see in robtest is the same as the barcode for the tapes as seen in NBU).

Remember, NBU has no effect on the barcodes displayed by robtest, these are sent from the library and are controlled by the library settings (despite whatever anyone else may tell you ...).

Move media to stand alone, and re-inventory

Or

For each media, change the barcode to match what robtest displays

bpmedia -m <media id> -barcode <barcode as seen in robtest>