This section describes how to perform a full-system cold restore of your Informix database if you use ontape as your data recovery tool (that is, for your archives and backups).

• You are logged on as user informix or root .
• The database server is offline.

• The procedure is easier if you have two tape devices (in the example below, /dev/rmt/0m and /dev/rmt/1m are used).
• You have completed Preparing for a Full-System Cold Restore (ontape).

1. Mount the tape containing the level-0 archive of rootdbs onto the device specified by the TAPEDEV parameter in the ONCONFIG file and execute the following command:

$ ontape -r



For Windows NT, to check if the chunks listed really exist, enter:

dir <chunkname>

If you need to create non-existent chunks, enter:

copy NUL <chunkname>

For UNIX, check your raw device layout for chunk names.

2. If it is possible to salvage the logical-log files currently on disk, ontape prompts you to do so. Salvage the files, if possible, using a new tape.

During the restore, ontape prompts you to mount the tapes with the relevant archives and logical-log files, including the logical-log files that you just salvaged.

3. Follow the prompts to mount new tapes.

The database is now restored and you can use the R/3 System productively again. Use SAPDBA to put the database online. Refer to Changing Server Mode with SAPDBA.