We are fairly basic.  A TS3500 Library with TS1120 E05 drives.  It is ficon
attached.

Lizette

> 
> Lizette, To get a correct answer you need to provide details of what kind
of
> encryption you are doing.
> Are you using encryption in the tape hardware (for example IBM TS1120
which
> are encryption enabled), or are you encrypting using s/w on the host
system?
> 
> Outboard encryption in the IBM tape hardware is complete volume and is
> almost no different performance than not encrypting. Using s/w - well that
is
> a different story and would depen d on the s/w you are using.
> 
> Mike Wood   RMM Development
> 
> On Tue, 14 Jul 2009 12:33:04 -0400, Lizette Koehler
> <[email protected]> wrote:
> 
> >When you run tape Encryption on a stacked tape do you encrypt all files
> that are stacked on a tape or just one file on the stacked tape?
> >
> >For example, I have a batch backup job that places 35 dumped volumes on
> one tape.  I have looked at the doc and it seems I could place the
encryption
> on the first file only and the whole tape will be encrypted.
> >
> >Or does it not take any more time or resources to have encryption happen
> for each volume on the stacked tape?
> >
> >I have been asked to place encrption on each file via Dataclas/ACS
routines
> on a stacked tape.  I am just trying to get a handle of what the
performance
> trade offs are.
> >
> >Lizette

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