On Tuesday 19 March 2013 08:48:10 Michael Leone wrote:
> > The question is: What is wrong with a logical copy?
> > Pros:
> > - Networker will not get confused if he happens to see both tapes at
> > the same time
> > - Easy to create. No wizardy needed.
> > - No issues with varying capacity on tapes due to different write
> speeds.
> >
> > Cons:
> > - None
>
> So let's assume: I make a logical copy (clone using nsrclone) of my tape
> that has the bootstrap and CFI on it. I keep the clone tape local in my
> tape library; I send the original offsite, for safety. Now I need to do a
> CFI recovery (nsrck -L7). Which tape will NW ask me to load and mount? The
> original, or the clone?
>
> If the original, then I have to recall it from offsite storage (which in
> my case requires approval from further up the corporate ladder), which
> takes time. Then I have to do the CFI recovery, then determine which
> actual data tapes I need, and recall them, which is more time. (you'd be
> surprised at the number of recover requests I get that start (I don't
> remember the exact name of the file, but it's something like ...", meaning
> I need to browse the CFI to determine what I need, and what tapes I need
> from that point onward)
>
> If NW will let me recover the CFI from the clone, then I can cut out one
> of those tape recall steps, and save time.
>
> So (and it's an honest question, since I don't know): will NW use the
> locally available clone to do the CFI recover? I suspect not, but I don't
> know for sure.
He will use the clone iff you mark the original CFI savesets suspect before you
start the CFI recovery.
> This is NW 7.6.2, BTW.
>
> I find it surprising that NW doesn't have a utility to make such a copy.
> According to my boss, even ArcServe had that capability, years ago, before
> we started using NW.
There was never any need for that.
Best
Dag
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