[Info-vax] Shadow Volume Copy

[BaxterD at tessco.com]

OK,
      Not totally sure that I understand exactly why you are doing
this this way, however.

1.   JF's comments are correct, when you remount the dismounted shadow
unit (lda1) it will become the subject of a FULL shadow-copy.
(depending on VMS Vers and disk size, this could take a while)
2.   You cannot dismount lda2 until lda1 is a complete member.

Suggestion.

dismount lda1 using

$ dismount/policy=minicopy lda1

Now when lda1 is remounted it will do a "MiniCopy" (which takes
literally a couple of minutes or even seconds).

Then execute a small loop (every 5 sec say) and check the value of f
$getdvi("DSA0:", "SHADOW_MBR_COUNT").   When the copy is done, this
will return a value of 2.    While the copy is going on, it will
return a value of 1.

When the copy is complete then continue with the next step in your
script.

Note, I think MINICOPY arrived with OpenVMS 7.3-n (n=1 or 2), check
dismount help for qualifier "/policy".    When Minicopy is used, the
system creates a bitmap for the volume and tracks changes.    when
remounting, it only has to sync up the blocks which have changed,
which is why it is very fast.

Hope this helps