Removing disk units that have device parity protection for System i while powered on

Here are the detailed steps for removing disk units that have device parity protection for your system while powered on.

1. 
   
   Attention: If possible, use a wrist strap to prevent electrostatic discharge from damaging your hardware.
   If you do not have a wrist strap, touch a metal surface of the system or expansion unit before installing or replacing hardware.

   If you received the 2209 Disposable Wrist Strap, follow these steps:

   1. Attach the disposable wrist strap.
   2. When you unroll the strap, remove the liner from the copper foil at the end.
   3. Attach the adhesive part of the copper foil to an exposed, unpainted metal surface on the frame of the unit.
   Note: Follow the same precautions you would use without the wrist strap. The 2209 Disposable Wrist Strap is for static control. It does not increase or decrease your risk of receiving electric shock when using or working on electrical equipment.
2. Find the Disk unit locations for your system unit or your expansion unit.
3. Remove the disk unit cover. Squeeze the latch and pull out.
4. Be sure you are signed on with at least service level authority.
5. Type strsst on the command line and press Enter.
6. Type your service tools user ID and service tools password on the System Service Tools (SST) Sign On display and press Enter.
   Note: The service tools password is case sensitive.
7. Select Start a service tool from the System Service Tools (SST) display. Press Enter.
8. Select Hardware service manager from the Start a Service Tool display. Press Enter.
9. Select Device Concurrent Maintenance from the Hardware Service Manager display. Press Enter.
10. Type the Physical Location (Frame ID and position) where you will be replacing the disk unit.
    Note: The physical location of the disk unit to be replaced should have been provided by customer support.
    In this example, Physical Location: Frame ID 1 Position D06, you would install a disk unit in frame 1 (base system), disk unit position 6.
11. Select option 1 (Remove device) for the action to be performed.
12. Set the time delay for 1 minute—01. Do not press Enter at this time.
    Note: Locate the light in the numbered arrow by the disk unit you are replacing. When you press Enter, after a one minute delay, this light comes on and begins to flash rapidly. You then have 9 seconds to slide the disk unit into place.
13. Press Enter on the console.
14. When the light starts flashing, squeeze and pull the handle of the disk unit out toward you before you remove the disk unit. If the handle is not all the way out, the disk unit will not slide out of the system.
15. Support the bottom of the disk unit assembly as you slide it completely out. Do not hold the disk unit by the handle.
16. The light will stop flashing and remain off when the disk unit is removed.
17. Return to the console and wait until the Concurrent Maintenance Results display appears. Press F12.
18. Find the package that contains the new disk unit assembly and remove it from the static-protective package.
    Attention: Disk units are fragile. Handle with care.
19. Unlock the handle by squeezing and pulling it out toward you before you install the disk unit. If the handle is not all the way out, the disk unit will not slide into the system unit or the expansion unit.
20. Support the bottom of the disk unit assembly as you slide it half way into the system unit or the expansion unit. Do not push it any further.
    Note: You install the disk units horizontally in the 7123, 7136, and 7137 disk unit enclosure.
21. The physical locations you entered in step 11 of this procedure might still appear on the display. If not, retype the Physical Location (Frame ID and position) where you will be installing the new disk unit. In this example, Physical Location: Frame ID 1 Position D06, you will install a disk unit in frame 1 (base system), disk unit position 6.
22. Select option 2 (Install device) for the action to be performed.
23. Set the time delay for one minute—01. Do not press Enter at this time.
    Note: Locate the light in the numbered arrow by the disk unit you are replacing. When you press Enter, after a one minute delay, this light comes on and begins to flash rapidly. You then have nine seconds to slide the disk unit into place.
24. Press Enter on the console.
25. When the light starts flashing, slide the disk unit all the way in and then lock it in place by closing the latch.
26. The light stops flashing and remains on when you have installed the disk unit properly.
27. Return to the console and wait until the Concurrent Maintenance Results display appears. Press Enter.
28. When the Hardware Service Manager display appears, press F3.
29. Select Work with Disk Units on the System Service Tools display. Press Enter.
30. Select Work with disk unit recovery on the Work with Disk Units display. Press Enter.
31. Select Rebuild disk unit data on the Work with Disk unit recovery display. Press Enter.
32. Select 1 to rebuild the disk unit displayed (disk unit displayed is the disk unit that you removed) on the Rebuild Disk Unit Data display. Press Enter.
33. Press Enter on the Confirm Rebuild Disk Unit Data display. The rebuild process might take several minutes to complete.
34. Install the disk unit covers. Align the tabs on the disk unit cover with the slots in the system unit. Push the cover in until it latches.
35. Install or close the system unit or expansion unit front cover.
36. Press F5 to refresh the display until the Percent complete filed shows 5%.
37. When the display shows at least 5% complete, you can either continue to monitor this display to completion, or press F3 (Exit) to return to the Work with disk units display.
38. Press F3 (Exit) to return to the System service tools display.
39. Press F3 (Exit) to return to the exit SST display and press Enter.