Toasters,

I thought this might work since TSM v5.5 provides a new "Filer-to-Server" mode, where the tape drives are connected to the TSM server. This stores the NDMP backup data in normal TSM storage pools - which should inherit all normal storage pool functions, such as simultaneous write...

However, it seems that simultaneous write is NOT supported for NDMP data - even in the new Filer-to-Server configuration. :(
Refer to "10.3 Filer-to-server backup" on Page 146 and 152 of the new TSM v5.4 and v5.4 technical guide: http://www.redbooks.ibm.com/redpieces/abstracts/SG247447.html

And here's a good PPT explanation of the various modes (at v5.4 level) here: http://www-1.ibm.com/support/docview.wss?uid=swg27010813&aid=1

That said though, it does support NDMP backup to a TSM disk storage pool, and from there you could write the primary and copy storage pool tapes (though not simultaneously). At least this keeps the backup duplication workload off the Filer.

Regards,
Steven P.

On Thu, 2008-02-28 at 06:07 -0800, Brent Wilkinson wrote:

TSM 5.5+ allows you to make back up copy pools of NDMP data but I do not believe you can do simultaneous writes to the primary and copy storage pools. The TSM server does not actually handle the writes to tape you define a data mover from the filer to the tape device.

From:owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Steven Pemberton
Sent: Wednesday, February 27, 2008 4:21 PM
To: George Kahler
Cc: toasters@mathworks.com
Subject: Re: in-line tape copy possible ?

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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Steven Pemberton
Solution Specialist, Synergy Plus
 
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-- 
Steven Pemberton
Solution Specialist, Synergy Plus

Office: 1300 139 308       Fax: 03 9690 9204
Direct: 03 9673 7319       Mobile: 0438 109 028
Web: www.synergy.com.au    Skype: spemberton

A Hyro Company 
Hyro Limited is listed on the Australian Stock Exchange (ASX: HYO)
For corporate & investor information visit www.hyrolimited.com