Mark,
I looked through our publications for a specific mention of what you
would like to have documented and couldn't find one. I will see about
getting
it included in the next round of publications.
I would like to take the opportunity to share our rationale and
accept
your feedback on it. In this particular scenario, you have requested
DFSMSdss
to take the image or contents of your source volume and write it to your
target
volume. The contents of the target volume for a full volume copy has been
tradtionally considered as unwanted. (If you wanted it you wouldn't have
used it as the target for the copy.) Likewise, if the target volume is in a
FlashCopy
relationship where it is the target of the relationship, then you must not
be
interested in keeping the relationship since that is equivalent to keeping
the
original contents of the target volume. Therefore, it is assumed to be
acceptable for the relationship to be removed so that the copy can proceed.
If
you think about it, had you specified FR(NONE) on the second COPY FULL, we
would have used normal I/O and the target volume would again not be in a
FlashCopy relationship with the original volume A.
We didn't want to force users to have to manually remove the
FlashCopy
relationship when they wanted to use that target volume as the target of
many
different source volumes (dumping them in between or otherwise not needing
the data on the target volume).
Thanks,
Andrew Wilt
IBM DFSMSdss Architecture/Development
IBM Mainframe Discussion List <IBM-MAIN@BAMA.UA.EDU> wrote on 01/31/2006
01:23:21 PM:
> I ran a DSS Copy step using: FULL, FASTREP(REQ), FCNOCOPY, DUMPCOND
> to set up a FC volume pair between volumeA(source) and volumeB(target).
> But instead of following this with a DSS Dump step from volumeB, I
> mistakenly ran another DSS Copy step to set up a FC volume pair
> between volumeC(source) and volumeB(target).
> And it worked. It dropped the pairing between volumeA and volumeB
> and created the pairing between volumeC and volumeB.
> I thought that there would be some protection to prevent selecting a
> target volume that was already in a Flashcopy relationship.
>
> Can anyone point me to documentation that states this is WAD?
>
>
> Mark Kliner
> Systems Programmer
> Vision Service Plan
> Rancho Cordova, CA
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