Bill,


> Q1. Can I backup a TSM database onto a volume that has
> already contained another db backup? another word,
> Can I run the following command twice without failure?
>   TSM> backup db type=full devclass=tapeclass
> volumenames=dbbk1
> when I ran the command the second time, the TSM said
> the dbbk1 is already in use - skipped

No, this is not possible.
If we are able to put 2 (or more) TSM database volume on to one
tape.
If the tape was damage or defective, we not lost one database
but two (or more) database at the same time.



>
> Q2. How to backup recovery log?
> Is backing up the OS file systems on where the
> recovery log was created the only way or one the ways
> to do that?
>

Every time that the TSM database is backed up, the data in the
recovery log is commited to the data base.



Sias

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