Lenovo ThinkServer Storage SA120 (English) User Guide and Hardware Maintenance - Page 51

• If you are installing a drive, save the removed dummy drive tray in the event that you later remove the drive and need a dummy drive tray to cover the drive bay. • If you are replacing a drive and are instructed to return the old drive, follow all packaging instructions and use any packaging materials that are supplied to you for shipping. 9. Configure RAID after you replacing or installing a drive. See Chapter 4 "Configuring RAID" on page 27. Installing or replacing a power supply Attention: Do not open your storage array or attempt any repair before reading and understanding the "Safety information" on page iii and "Guidelines" on page 31. This topic provides instructions on how to install or replace a power supply. This topic applies only to storage array models that come with one or two power supplies. When the storage array is populated with two power supplies, it can withstand a power loss from either power supply. This helps you avoid significant interruption to the operation of the storage array when a power supply fails. You can replace the failing power supply without turning off the storage array. Some storage array models come with only one power supply. You can purchase a power supply option from Lenovo. CAUTION: Hazardous moving parts. Keep fingers and other body parts away. CAUTION: Never remove the cover on a power supply or any part that has the following label attached. Hazardous voltage, current, and energy levels are present inside any component that has this label attached. There are no serviceable parts inside these components. If you suspect a problem with one of these parts, contact a service technician. Before you begin, print all the related instructions or ensure that you can view the PDF version on another computer for reference. Chapter 6. Installing, removing, or replacing hardware 39