Which option is the most reasonable for recovering a non-critical system?

In the context of recovering a non-critical system, selecting a cold site is the most reasonable option. A cold site is essentially a backup location that is equipped with the necessary infrastructure—such as power, cooling, and space—but it lacks the immediate availability of hardware, applications, or data. This type of site is typically less expensive to maintain than the other recovery site options.

For a non-critical system, where immediate recovery isn't essential for business operations, a cold site can provide a cost-effective solution. When a failure occurs, the system can be restored using backups that are transported to the cold site. This recovery approach is adequate since the non-critical system does not require the immediate processing capability that hot or warm sites provide.

Hot sites, which maintain real-time backups of the systems and can be operational almost immediately, and warm sites, which have some hardware and are partially equipped to handle backup operations, are generally better suited for critical systems where downtime needs to be minimized. On the other hand, mobile sites are more flexible and typically used for certain specific scenarios, often involving transportable technology and setups optimized for particular situations.

Thus, a cold site is aligned with the needs of a non-critical system, allowing for recovery while minimizing operational costs.