HP OpenVMS Systems

ask the wizard
Content starts here

Disabling Device Autoconfiguration? (IDE)

» close window

The Question is:

Is there a way in vms to remove or hide the non exsistant dqa1:, dqb0:, and
 dqb1: ide devices? I understand that they exist for hot plug purposes, but we
 will not hot plug these devices.

The Answer is :

  The effort of disabling the IDE device controller configuration
  process is likely more work than it is worth -- by the time OpenVMS
  learns the IDE device is not available, backing out and removing the
  references is difficult.  Accordingly, you would have to disable the
  entire autoconfiguration process, and then manually autoconfigure
  excluding the specified devices.  (This may or may not work.)
  Hot-swapping of IDE is not available on any OpenVMS system that the
  OpenVMS Wizard is presently (as of August 2001) aware of.
  Alternatively, assuming that this is a device naming collision in an
  OpenVMS Cluster, you can enable and use port allocation classes with
  the IDE devices and avoid this device name collision.
    * In SYSGEN, make sure DEVICE_NAMING is set to 1, and
      ALLOCLASS is set to a non-zero value.
    * Create a file named SYS$SYSTEM:SYS$DEVICES.DAT, that
      specifies a Port Allocation Class of 0 for the two DQ
      controllers (DQA and DQB).
  You can either edit this file to add the information manually, or update
  this file automatically by using the following commands at bootstrap time:
  Following is a sample SYS$SYSTEM:SYS$DEVICES.DAT file (for node ACORN::):
    [Port ACORN$DQA]
    Allocation Class = 0
    [Port ACORN$DQB]
    Allocation Class = 0
  This procedure causes all DQ devices to be named in the following format,
  thus allowing for unique device names across the cluster:
      nodename is the system name
      x is either A or B
      n is either 0 or 1

answer written or last revised on ( 24-AUG-2001 )

» close window