急！急！急！AIX下做STANDBY时不能alter database open read only

Niy38

From the Oracle document:

The following are operational requirements for using Data Guard:

    * The same edition of Oracle Enterprise Edition must be installed on all systems in a Data Guard configuration.
    * The primary database must run in ARCHIVELOG mode.
    * The same Oracle software release must be used on both the primary and standby databases. The operating system running on the primary and standby locations must be the same, but the operating system release does not need to be the same. In addition, the standby database can use a different directory structure from the primary database.
   ...........................

It emphasized that same "edition" and "release" MUST be used for primary and standby database.

It might be possible that standby database works, while not meeting the above requirements, but just a kind of
un-defined behaviour.