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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
Bala,

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
zxmaus
 

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OVDB_INIT(8)						    InterNetNews Documentation						      OVDB_INIT(8)

NAME
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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