[Info-vax] Shadowing & Reboot

[Ken Fairfield]

On Thursday, May 17, 2012 7:08:30 AM UTC-7, Christoph Gartmann wrote:
> Hello,
> 
> yet some more questions concerning shadowing of a non-system disk:
> 
> I created a shadow set with two disks, each disk connected to a different node.
> So far so good. Then I rebooted node 1. When node 1 was up again, I had to
> manually add its disk back into the shadow set. So, should I put this mount
> command into SYSTARTUP_VMS.COM? Next, the remounted disk went into a full
> copy state, although there were no changes made to the surviving disk on
> node 2. Is this normal?

Phillip Helbig has done a lot of this.  You might want to search
the archives of c.o.v for his various posts.  I'd consider him
the Resident Expert on these configurations. :-)

One thing that will help you a *lot* would be to mount and dismount
node 1's shadow members with /Policy=Minicopy.  Similarly when for 
node 2 when it reboots.

As another post demonstrated, you MOUNT/SHADOW specifying both
members on both nodes (I believe specifying a single member works,
but I've always felt "safer" to specify both).  But you made want 
to code some DCL around the mount command in case the "other" node 
isn't up and it's member is available, so you only specify the 
local node's member in the mount.

   -Ken