IBM System Storage Subsystem DS5020 - Manual (Page 182)

15. Insert the new front cage plane/midplane by aligning it with the storage
subsystem front opening and slowly sliding it into the storage subsystem
chassis. Make sure that the front cage frame EMC gaskets do not snag
between the frame and chassis.
16. Tighten the four front cage frame screws. See Figure 86 on page 150.
17. Install the seven Phillips screws (three on top and four on bottom) that hold the
front cage frame to the EXP810 chassis that you removed in step 12 on page
150, as shown in Figure 87 on page 151.
18. Push the chassis all the way back into the rail and install the four M5 screws
along the side edges of the DS5020 chassis.
19. Install the four Phillips screws on the back along the sides of the DS5020
chassis that hold the DS5020 to the rails.
20. Insert the E-DDM CRUs. Be sure you insert them in the correct slots. Use the
labels you put on them before you removed them to guide you.
21. Re-insert the controllers and reconnect the Fibre Channel cables.
22. Re-insert the power supply and fan units and reconnect the power supply
cords.
23. Turn on the power to the attached storage expansion enclosures.
24. Wait at least 3 minutes and then turn on the power to the DS5020 storage
subsystem. Verify the status of the configuration using LEDs and the DS
Storage Manager client program.
25. After removing the faulty cage frame with midplane assembly, transpose the
DS5020 serial number, machine type, and model tag from the faulty cage
frame assembly to the Repair Identification (RID) tag on the new cage frame
assembly. The RID tag is important in transferring the serial number, machine
type, and model from the faulty cage frame assembly to the new cage frame
assembly. Make sure that the new RID tag is affixed to the new cage frame
assembly before you dispose of the faulty cage frame with midplane assembly.
This will so that the warranty coverage is not interrupted.
152 IBM System Storage DS5020 Storage Subsystem: Installation, User’s, and Maintenance Guide