From: hoffman@xdelta.zko.dec.nospam Sent: Monday, May 22, 2000 7:45 AM To: Info-VAX@Mvb.Saic.Com Subject: Re: I Don't want that cluster. What to do? In article <3925E229.A45D5D5F@videotron.ca>, JF Mezei writes: :I you wish to disable the clustering, you can: : :MC SYSGEN :USE CURRENT :SET VAXCLUSTER = 0 :WRITE CURRENT :On both nodes. I would encourage the use of MODPARAMS and AUTOGEN, and not direct access to SYSMAN or SYSGEN. If the above command sequence is used (and you don't also update MODPARAMS), you can/will see the cluster "return" the next time that AUTOGEN is run. Disabling NISCS_LOAD_PEA0 is also a good idea. :If you wish to retain all the wonders of a cluster, you also need to set a :different allocation class on each machine... :SET ALLOCLASS = 1 on one node and SET ALLOCLASS = 2 on the other node. There are a couple of other wrinkles (read: other places where you will usually want to configure allocation class settings) on recent releases, with port allocation classes, and on all OpenVMS releases with DSSI and/or CI storage is present. :This way, the cluster can differentiate between 2 drives with the same device :name in your cluster. And more specifically, to differentiate devices with the same device unit number. :However, having 2 system disks does require a bit more work compared to :sharing a single system disk. (queue manager etc). Some files are still shared. The queue manager database can be shared, or there can be multiple databases. For additional information on splitting a cluster, see the OpenVMS Ask The Wizard area. Search for topics with titles containing "divorce" or "splitting" as a start. I'll look at adding this to the next FAQ. --------------------------- pure personal opinion --------------------------- Hoff (Stephen) Hoffman OpenVMS Engineering hoffman#xdelta.zko.dec.com