Which of the following is a common practice with regards to hot spares on a storage array utilizing RAID?

Hot spares are highly recommended in RAID configurations to increase fault tolerance and reduce recovery time by automatically initiating a rebuild process upon drive failure.

A ratio like one hot spare for every thirty drives is an arbitrary number and does not guarantee that compatible spares will be available for all drive types and sizes present in a diverse array.

A single hot spare for the entire array is insufficient if the array contains drives of different sizes or types, as a hot spare must be compatible with the drive it replaces to facilitate a successful RAID rebuild.

It is common practice to create at least one hot spare for each distinct drive size and type within a storage array to ensure that a compatible replacement drive is immediately available for any failed drive. This strategy accounts for environments with mixed drive configurations and optimizes recovery time by having appropriate spares ready.