Editing Hot swapping (section)

=== Component shutdown procedure before unplugging ===
Some implementations require a component shutdown procedure prior to removal. This usually results in a simpler design, but such devices are not robust in the case of component failure. In such cases, if a component is removed while it is being used, the operations to that device fail and the user is responsible for retrying if necessary. In practice, this can be an advantageous trade-off for certain designs where cost matters more than reliability.

More complex implementations may recommend but do not require that the component be shut down. In the suboptimal case a component is removed without being shut down, these implementations usually have sufficient [[redundancy (engineering)|redundancy]] to allow essential operation to continue. In these systems hot swap is normally used for regular maintenance to the computer, or to replace a broken component.