On Thu, 6 Oct 2005 16:10:53 -0300, Gilles Schipper <[log in to unmask]> wrote:

> Is there a way to copy the disk store-to-disk files onto dds in
> such a way that it would be possible to perform the restore
> operation directly from tape, rather than disk - and thus reduce
> the highwater mark of total disk space required. 

I am working on this and the short answer is no, the longer answer 
is: It is either messy or involves spending money, or both.  You 
may wish to look at Allegro's XOVER product.  I cannot testify as 
to its cost or efficacy in accomplishing what you desire but it was 
suggested to me in my trials with S-T-Disc files and their 
inalterable block sizes. From what I can glean from their web site 
it may do what you want.  

The other route I am experimenting with is using dd on Linux to 
move S-T-D files to dds tape (For some reason the MPE man page for 
dd claims that it does not support tape devices). However, I have 
more prosaic tasks to accomplish before I have the time to proceed 
with that project.  The difficulty will come if you have more than 
one "reel" or require more than one dds tape.  Then I think that a 
purpose built utility will be necessary.  I have briefly glanced at 
FCOPY's documentation regarding this and on first glance it seems 
that it is even possible that FCOPY might be able to do the job 
with a shrewd enough approach.

I hope that this information provides you with a few leads.


Regards,
Jim

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