Restoring Data 
Use
If a hardware error
occurs, the Database Manager supports the recovery of the 
database instance
by importing backups.
You can recover either the last database
state or an earlier one.
If the automatic log backup function was not activated before the recovery of the database instance started, this function is not automatically reactivated after recovery has taken place.
To reactivate the log backup function, execute the command for activating the automatic log backup function.
Prerequisites
All the backup history
data is available.
Procedure
To obtain the
highest possible throughput of data, complete and incremental data backups can
be retrieved from a number of backup media
simultaneously. The number of
parallel backup media in this case does not depend on the number of parallel
backup media used to make the backup originally. Even a backup made to single medium plus succeeding
media can be restored in parallel.
You can set the
maximum number of backup devices from which it is possible to restore
simultaneously with the database parameter MAXBACKUPDEVS.
The use of up to 32 tape devices allows
you to reduce restore times considerably.
The Database
Manager GUI always suggests the quickest way of effecting a restore.
Complete data backup(s) are restored
first in this case and these are followed firstly by incremental backups, if
required, and then by log
backups.
Log backups cannot be read in parallel.
Restore Process
Continuing an Interrupted Restore
Restoring a Backup from the Backup History
Restoring the Indexes After a Database Restore
Restoring the Last Complete Data Backup
Restoring an Existing Database Instance
Restoring with an Automatic Tape Loader
Restoring with External Backup Tools
Restoring Without a Backup History