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Operating Systems AIX How can I manage redundant HMC upgrades with firmware upgrades? Post 302346998 by zxmaus on Monday 24th of August 2009 03:50:25 PM
Old 08-24-2009

hmc firmware upgrades are downwards compatible but NOT upwards compatible. If you upgrade only one hmc and than the frame, you will have problems afterwards with the other hmc - if you upgrade both hmcs first, you won't have any issues and your not-upgraded frames won't have issues either.

Kind regards

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OVDB_INIT(8)						    InterNetNews Documentation						      OVDB_INIT(8)

ovdb_init - Prepare ovdb database for use SYNOPSYS
ovdb_init ["-u"|"-r"] DESCRIPTION
This command must be run before any other process can access the overview database. It performs the following steps: 1. Creates the database environment, if necessary 2. If the database is idle (and if the "-u" option is not specified), it performs a normal recovery. The recovery will remove stale locks, recreate the memory pool cache, and repair any damage caused by a system crash or improper shutdown. 3. If the "-u" option is specified, it performs any necessary upgrades to the database. See the UPGRADING section below. 4. Starts the DB housekeeping processes (ovdb_monitor) if they're not already running. (Unless the "-r" option is specified). 5. Starts the ovdb readserver (ovdb_server) processes if readserver in ovdb.conf is true, and if they are not already running. (Unless the "-r" option is specified). Returns exit status of 0 if all steps were completed successfully. In the event of an error, messages are written to syslog and/or stderr. If a recovery was attempted but it failed, the database may be damaged beyond repair, requiring a rebuild with makehistory(8). This command is normally invoked automatically by rc.news(8). It is OK to run this command multiple times. OPTIONS
"-r" Perform recovery only. "ovdb_monitor" is not started. "-u" Perform any needed upgrades. Recovery is not attempted. "ovdb_monitor" is started if the upgrade succeeded. UPGRADING
There are two situations in which the database will need to be upgraded: o You upgrade the Berkeley DB library to a newer version, for example from 2.7.7 to 3.1.17. In this case, the Berkeley DB db->upgrade() method is used. o You upgrade ovdb to a newer major version; i.e., ovdb-1.0 to ovdb-2.0. In both of these cases, the database is upgraded in-place; and the upgrade can not be undone. Do not interrupt the upgrade process once it has started, because there is a risk of irrepairable corruption. The upgrade may take several minutes to complete. If an upgrade does get interrupted, try running the upgrade again. Here's an example procedure to upgrade a database created with Berkeley DB 2.7.7 to use Berkeley DB 3.1.17: 1. Build and install the Berkeley DB 3.1.17; 2. Run configure in the INN source tree and make sure it picks up the right Berkeley DB directory (e.g., /usr/local/BerkeleyDB.3.1); 3. Do a "make"; 4. Shut down INN (e.g., with "rc.news stop") and be sure to kill all instances of nnrpd as well; 5. Do a "make update" to install the new binaries; 6. Run "ovdb_init -u" as the news user; 7. Start INN with "rc.news". It is OK to specify "-u" even if no upgrades are needed. HISTORY
Written by Heath Kehoe <hakehoe@avalon.net> for InterNetNews. $Id: ovdb_init.pod 7851 2008-05-26 19:33:08Z iulius $ SEE ALSO
ovdb(5), makehistory(8) INN 2.5.2 2009-05-21 OVDB_INIT(8)

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