[Info-vax] Odd Show Device (DSSI disks in cluster)

[Volker Halle]

On 25 Dez., 16:01, JF Mezei <jfmezei.spam... at vaxination.ca> wrote:
> Volker Halle wrote:
> > There is no mechanism in the MSCP
> > protocol to indicate, that the MSCP server has lost connection to the
> > ISEs of the real DSSI disks.
>
> Say node 1 sees MSCP nadvertisements for DISK A by both nodes 2 and 3.
>
> If node 2 loses connection to disk A, and node 2 can't tell other nodes
> that it has lost access to diskj A,  how is node 1 going to know that it
> must now ask node 3 for any access to Disk A snce node 2 has lost its
> connection to it ?

JF,

if the MSCP device is served by 2 nodes, node 1 will know about that.
During MOUNT, it will try both pathes to the disk via node 2 and also
via node 3. If one path works, it will be able to mount the disk.

Volker.