restoring virtual copy tape o primay tape

Hi,
I had a problem with a copy tape a while ago(move data didnot work) and it made me wonder and come up with a question.
I have been searching the internet without any clear answer.

Suppose you primary virtual tape named tapev001 has read errors and you need to restore it from the copy tape.. How do you do that ?

I know with select volume_name, read_errors,write_errors from volumes you get to see the tapes that have errors. So we know the serve that th tap is on and the tape name.
eg server life001 tape tapev001 , we also know that the copyserver that belongs to the primary server is names backup001.

- how do you know what the name of the tape is in the backupserver ?
- how do you restore the data from the copy to the primary ?
- any verification ?

Thankx for your help.