[Info-vax] Shadow Volume Copy

[Bob Gezelter]

On Mar 27, 4:55 am, Ramon Jimenez <rjime... at ford.com> wrote:
> I think I can't see the forest for the trees.
> Jan Erik and JF are right all shadow member are equals so I only need
> to copy one of them.
>
> In source machine I dismount one of the members and copy the dsk file
> across the target machine and remount the shadow.
>
> In target machine, I dismount the whole DSA disk nor the LDAs then I
> need to disconnect the LDAs from the dsk files. Now I only need to
> replace the dsk files with the one I copied from the source machine
> reconnect the LDAs again and mount the DSA disk and.... that's all
> folks.
>
> I just realized that I did not was able to give details about the
> environment....
>
> Thanks all for your help
> Ramon

Ramon,

One would achieve even less impact if one connects a third (new)
member to the source shadow set, and waits for that shadow copy to
complete.

Then, with the applications in a suitable state, detach the newly
created third member and copy the image of the third member to the
other system.

The advantage of this scheme is that the source shadow set NEVER goes
below two members. Detaching one member of a two volume shadow set
leaves the system vulnerable for the interval between the detach of
the second member and the completion of the resynchronization.

- Bob Gezelter, http://www.rlgsc.com