[Info-vax] automatic shadow copy?

[IanD]

On Monday, March 23, 2015 at 9:43:52 AM UTC+11, Phillip Helbig (undress to reply) wrote:
> After upgrading to 8.4, I replaced a 4-GB member of the system-disk
> shadow set (which I now have as a backup of the old system) with a 9-GB
> disk.  (Soon, I will replace the 4-GB member and use DVE to increase the
> size of the system disk.)  I put in the new disk, ran AUTOCONFIGURE, and
> wanted to test it a bit before interactively adding it to the shadow
> set.  However, within a few seconds it had somehow become the target of
> a copy operation.  The copy operation looks OK and is doing what I 
> wanted.  Still, I am puzzled.  I have done this often before and have 
> never had the copy start automatically.
> 
> Has something changed in this area?

Sorry but I don't know the answer to your question but I have a similar question, so I hope you don't mind me piggybacking on your thread?  I'm thinking the answer may possibly be related?

I have a 7.3-2 Alpha system (ES80). Two members in the system disk shadow set are local disks

I was under the impression that shadow members have to be specifically added to the member set but when our system boots, the system disk shadow member is automatically added and completes under a merge operation. Obviously shadow system disk is ticked in sysgen etc

I cannot find any reference to the shadow member disk anywhere in any procedures we run so I'm guessing that this information is embedded somewhere on the primary shadow member itself and that vms is automagically adding in the second shadow disk member of the system disk when it boot?

I thought this went against the recommendation that a system disk shadow member should not automatically be added in case it's a last known good copy then you have nothing to go back to? I think I read that somewhere

Any doc source that I can read up on to explain this auto adding phenomenon  would be great too :-)