George,

You may be able to do this with IBM's Tivoli Storage Manager (TSM) as it supports "simultaneous write" to multiple backup media (up to 10 copies).

TSM does support NDMP backup, but I don't know if it supports simultaneous write from an NDMP source - but I don't see why it wouldn't...

In this arrangement the tape drives would need to be connected to the TSM server - not the Filer - and the NDMP data would traverse the LAN before being written to disk and/or multiple tapes.

Of course, this means changing your backup software. But TSM is good. :)

Regards,
Steven P.

On Wed, 2008-02-27 at 13:15 -0500, George Kahler wrote: 
Hello,
I haven't checked with Netapp yet, but would anyone here know if it is
possible to have a ndmp backup going to two tape drives , thus creating a
duplicate copy ?

I have a dual port HBA for the tape drive(s) on a FAS3040 head with
DOT 7.2.2. The drives are IBM LTO3s and the backup software is
NetBackup version 6.0MP4.

I would like to add a second tape drive on the the HBA and do the
in-line tape copy rather then duplicating the data at a later time.

Thanks,
George Kahler
York University



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