I would strongly recommend to opt for second tape drive 
before  even thinking about workarounds.

Your custommer should understood that working with single drive only 
makes his backup and (TSM) management processes stop in case of single HW 
failure.

Even normal TSM management is pain with only one tape.

Each TSM installation should use 2 tape drives at least,
AFAIK this is even documented in TSM oficiall documents.

Maybe not what you wanted to hear,
but I am sure you will not make your custommer happy otherwise.

Praise your customer he is FULLY right when he wants to duplicate his backups
and make him clear there is no free lunch.


best regards


Juraj




> -----Ursprüngliche Nachricht-----
> Von: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] Im 
> Auftrag von Sasho Sterjovski
> Gesendet: Freitag, 24. November 2006 11:07
> An: ADSM-L AT VM.MARIST DOT EDU
> Betreff: duplicate backup
> 
> I have TSM5.3 on AIX and LTO3573 TS3100
> 
> My customer wants to duplicate backup-data.I don't have DISK 
> Storage and only 1 tape drive, so I can have only primary 
> storage pool. 
> Can I beackup data from one node to two different tapes can I 
> tell TSM to backup data on tape that I specified
>