Setting Up Raw Disks For Multi-Node Access and I/O Fencing

You can set up raw disks for multi-node access and I/O fencing.

1. Set each node with the following:
   1. Set reserve_policy to no_reserve on the quorum device and all raw database devices:

      chdev -l hdisk# -a reserve_policy=no_reserve

   2. Each node, with a unique node ID for each node:

      chdev -l hdisk2 -a reserve_policy=no_reserve

2. Run the following as SU or SUDO before starting dataserver, and make sure you have the appropriate shell privileges to run dataserver:

   setsecattr -p iprivs=+PV_KER_RAS $$

   You can also run setsecattr with user “sybase” if it has the appropriate roles, such as a non-network information services (non-NIS) user.
3. Create a user with privileges to run programs using OpenX:

   mkuser sybase 
   mkrole authorizations=aix.device.manage.change role_disk_access 
   chuser roles=role_disk_access sybase 

4. If you are setting up raw disks to provide multi-node access and I/O fencing on IBM AIX, follow these additional steps:
   1. Create the user "sybase": mkuser sybase
   2. Create role and grant to sybase:

      mkrole authorizations=aix.device.manage.change role_disk_access
      	chuser roles=role_disk_access sybase

   3. Add the security ‘aix.security.proc.set’ for set security attribute:

      smit -> Security & Users -> RBAC -> Roles -> Change -> 
      		'role_disk_access' -> AUTHORIZATIONS +'aix.security.proc.set'
      	setkst

   4. Change user to sybase and set the security attribute (set this attribute as default):

      su – sybase
      	setsecattr –p iprivs=+PV_KER_RAS,PV_ROOT,PV_SU_ $$