[Info-vax] Shadow System Disk between two Hosts

[JF Mezei]

Christoph Gartmann wrote:

> according to the manuals it should be possible to shadow a system disk between
> two nodes. I have to Itanium boxes, connected via ethernet and forming a
> cluster under OpenVMS 8.4. Currently each has its own system disk. Is it
> possible to have these disks form a shadow set and still have each node boot
> from a single member of this disk?

Possible to shadow systen disk: yes. It is in a sysgen parameter. Early
in the boot sequence, the system disk is converted to a single device
shadow set device (aka DSA0:)

I don't have experience with the system device for shadow sets. I have
to assume that once the DSA device has been formed early in boot, it is
up to the system manager to mount other physical devices to it, at which
point you could mount a device belonging to another node. But if that
device is also in its own DSA0 shadow set, not sure how they can be
combined.