A company's RAID array has degraded performance and a blinking red light on one of the bays. Which of the following should a technician replace?

In a RAID array, a blinking red light on a drive bay specifically signifies a problem with the hard disk drive (HDD) in that bay, indicating it has failed or is about to fail. Degraded performance is a common symptom when one or more drives in a redundant RAID configuration are compromised, prompting the need to replace the HDD.

A CPU failure would typically lead to a complete system crash or boot failure, not just degraded RAID performance with a specific bay light.

A PSU (Power Supply Unit) issue would affect the entire system's power, potentially leading to a complete shutdown or erratic behavior, not a single bay's light and degraded RAID.

RAM issues often cause system crashes, blue screens of death, or application errors, but are not directly indicated by a blinking red light on a drive bay in a RAID array.