Sybase IQ helps ensure that your server can be started even with inconsistent recovery information by providing a special forced recovery mode. You can use forced recovery mode to display corruption information and then to repair the database.
These procedures are described in the following sections of this chapter:
Forced database recovery differs from normal database recovery in these ways:
Forced recovery marks all storage within the database as in use. In order to recover a potentially inconsistent allocation map, all storage within the database is marked as in use. Use the sp_iqcheckdb in dropleaks mode to reset the allocation map to the correct state.
Incremental backups are disabled. After the database is opened in forced recovery mode, incremental backups are disabled. The next backup must be a full backup. Doing a full backup reenables incremental backups.
The forced recovery parameter applies to all opens of the database while the server is up. Therefore, after the database is opened, the DBA needs to bring the server back down, and then restart the server without the forced recovery flag, to be sure that subsequent opens run in regular mode. Repeated opens of the database with forced recovery on do not harm the database, but could be confusing to the DBA. Each time you open the database in forced recovery mode, all the storage within the database is marked as in use.
