[Info-vax] Sizing up Disks with Shadowing

[Ken Fairfield]

On Aug 10, 12:53 pm, Jan-Erik Söderholm <jan-erik.soderh... at telia.com>
wrote:
> tadamsmar wrote:
> > Can I introduce a larger disk into a shadowset?
>
> > I plan to replace 2.1 gig disks with 9 gig disks soon.
>
> > I was thinking I could do it by just putting them in the shadow set
> > and then switching the master.
>
> As far as I know, there is no "master" in a VMS shadow set.
> Not as soon as the initial shadow copy is ready at least,
> after that, the two (or three) disks are equal.

Actually, one member of a shadow set will be designated
the master.  I believe this is used as the source during
shadow copies.  Otherwise, all members are treated as
equal.

But I see I didn't complete my answer to the OP.
If a shadow set has been initialized for dynamic
volume expansion, you do the following:

1) shadow copy one (or more) larger shadow
    member(s);
2) dismount the "small" member(s) from the
    shadow set;
3) do a SET VOLUME/SIZE which will expand
    the volume size to that of the remaining
    shadow member.


    -Ken