BSI ID: G 0.25

If time-critical applications are run on an IT system, the consequential damage following a system failure is correspondingly high if there are no alternatives.

Examples:

• Firmware that is not intended for this type of system is installed on an IT system. The IT system then no longer starts up correctly and must be restored to working order by the manufacturer.

• At an Internet service provider (ISP), a power supply failure in a storage system caused it to shut down. Although the actual fault was quickly rectified, the affected IT systems could not be restarted due to inconsistencies in the file system. As a result, several web servers operated by the ISP were unavailable for several days.