# Full System Recovery of Informix Database: Restoring the Informix Database

Restore the Informix database in the event of a disaster.

#### Before You Begin

Rebuild the Operating System

It is recommended you avoid performing a salvage backup (e.g., zeroing out the root dbspace before restoring or performing a physical whole system restore plus a logical whole system restore).

#### Procedure

1. Add a instance on the destination host. Ensure that you are including the parameters that were used for the instance before the system failure.

2. On the destination host, start up the instance and then shut down the instance.

3. Log into the destination host and navigate to the $INFORMIXDIR/etc directory and perform the following file copies (using "cp"):

   ixbar.$serevrnum to ixbar.$servernum.org

   onconfig.$servername to onconfig.$servername.org

   oncfg_$servername.$servernum to oncfg_$servername.$servernum .org

   Follow the instructions in Browse and Restore to cross-restore the ixbar and onconfig files on the CommCell Console from the source host's backups. Modify the onconfig.$servername.org file to be identical to the onconfig.$servername file (i.e., ensure that DBSERVERNAME, SERVERNUM, and ROOTPATH are the same).

   Finally, copy the onconfig.$servername.org file to the onconfig.$servername file.

4. Log into the destination host and prepare dbspaces that refer to the oncfg files. All dbspaces physical paths must be the same (e.g., prepare the cooked file space, cat /dev/null > $INFORMIXDIR/dbs/test1/data/testdbs1.c1,

   chmod 666 $INFORMIXDIR/dbs/test1/data/testdbs1.c1,

   chown -R informix:informix $INFORMIXDIR/dbs/test1/data/testdbs1.c1)

5. Try to restore the whole system by following the directions in Browse and Restore. Avoid performing a salvage backup (e.g., zeroing out the root dbspace before restoring or performing a physical whole system restore plus a logical whole system restore).

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