IBM E Server i Series User manual

iSeries
43xx Disk Unit,
71xx Disk Expansion Unit,
71xx Disk Unit Enclosure
Version 5
ERserver


iSeries
43xx Disk Unit,
71xx Disk Expansion Unit,
71xx Disk Unit Enclosure
Version 5
ER s e r v e r


Note
Before using this information and the product it supports, be sure to read the information in
“Notices,” on page 71.
Fourth Edition (August 2005)
This edition applies to version 5, release 3, modification 0of IBM Operating System/400
® (product number
5722–SS1) and to all subsequent releases and modifications until otherwise indicated in new editions. This version
does not run on all reduced instruction set computer (RISC) models nor does it run on CISC models.
©Copyright International Business Machines Corporation 2000, 2005. All rights reserved.
US Government Users Restricted Rights –Use, duplication or disclosure restricted by GSA ADP Schedule Contract
with IBM Corp.

Contents
Chapter 1. 43xx or 71xx disk unit ....1
Before you begin .............1
Chapter 2. Replace 43xx disk units ...3
Replace 43xx RAID or Mirrored protected disk units
with system powered on ..........3
Replace 43xx RAID or Mirrored protected disk units
with system powered off ..........8
Chapter 3. Install 43xx disk units ...15
Install 43xx disk units with system power on ...15
Details: Install 43xx disk units with system
power on ..............16
Install 43xx disk units with system power off ...20
Details: Install 43xx disk units with system
power off ..............21
Open or remove the front cover ....29
270, 800, 810, 820, or 5075 front cover......29
825 front cover .............30
270, 800, or 810 in arack ..........31
830, 840, 870, 890, 5074, 5079, 5094 or 5095 ....32
Disk unit locations .........33
270, 800, or 810 system unit .........33
7104 or 7116 expansion unit .........34
820 system unit .............35
825 system unit .............36
830 system unit .............37
840 system unit .............38
870 and 890 system unit ..........38
5065, 5074, and 5094 expansion unit ......39
Select the optimal disk unit position .....39
5075 and 5095 expansion unit ........40
5079 and 5294 expansion unit ........41
Select the optimal disk unit position .....41
System-unit control panel ......43
Install the 7104 expansion unit to the
270 server or 7116 expansion unit to
the 800 or 810 server ........45
Install the 7123 or 7136 disk unit
enclosure .............55
Install the 7124 or 7127 disk unit
enclosure .............61
Install the power supply ..........65
Power down the system unit .....67
Remove the side and back cover ...69
Appendix. Notices ..........71
Trademarks ..............72
Terms and conditions for downloading and printing
publications ..............73
Code disclaimer information.........74
Electronic Emission Notices .........74
Federal Communications Commission (FCC)
statement ..............74
Electronic Emission Notices .........76
Federal Communications Commission (FCC)
statement ..............76
©Copyright IBM Corp. 2000, 2005 iii

iv 43xx Disk Unit, 71xx Disk Expansion Unit, 71xx Disk Unit Enclosure V5R3

Chapter 1. 43xx or 71xx disk unit
Replacing and installing this feature are customer tasks. When you use these
instructions, you will perform some or all of the following tasks:
vPerform prerequisite tasks.
vPower down the system.
vRemove the system unit covers.
vRemove hardware.
vInstall new hardware.
vInstall covers.
vIPL your operating system.
vVerify your new hardware configuration.
It will take approximately one hour to perform these tasks. You may need to allow
additional time to complete your jobs, back up your system, IPL your system, and
verify your hardware configuration.
You can choose to perform these tasks yourself or contact IBM(R) or an authorized
service provider to make arrangements for them to perform the tasks for afee. If
you encounter difficulties when performing atask, contact your authorized dealer
or service provider.
Note: If you are removing or moving disk units already installed in your unit refer
to Backup and Recovery .
Select the instructions for the task you want to perform:
vChapter 2, “Replace 43xx disk units,” on page 3
vChapter 3, “Install 43xx disk units,” on page 15
v“Install the 7104 expansion unit to the 270 server or 7116 expansion unit to the
800 or 810 server” on page 45
v“Install the 7123 or 7136 disk unit enclosure” on page 55
v“Install the 7124 or 7127 disk unit enclosure” on page 61
Some of the figures in these instructions may not look exactly like the system unit
that you have. However, the steps to perform the task are the same.
Before you begin
Before you begin areplacement or installation task, follow these steps:
__ 1. For an installation and if possible, for areplacement, ensure that you have
acurrent backup of your system (including operating system, licensed
programs, and data). If you have backed up the operating system and
licensed programs since the last time you applied PTFs, that backup is
acceptable.
__ 2. Ensure that you take afew minutes to become familiar with these
instructions.
__ 3. Ensure that you have access to amedium flat-bladed screwdriver.
©Copyright IBM Corp. 2000, 2005 1

__ 4. If there are incorrect, missing, or visibly damaged parts, contact one of the
following:
vYour authorized service provider
vIn the United States: IBM
® Rochester Manufacturing Automated
Information Line (R–MAIL) at 1–800–300–8751
vIn countries outside of the United States: Use the following Web site to
locate your service and support numbers:
http://www.ibm.com/planetwide
__ 5. If you are installing new hardware in logical partitions, you need to plan
and understand the requirements to be successful. Go to Logical partitions
in the Information Center.Then return to these instructions.
__ 6. If you encounter difficulties during the procedure, contact your authorized
service provider or your authorized dealer.
__ 7. Determine if there are any existing PTF prerequisites before you install your
new feature. Go to the following Web site:
http://www-912.ibm.com/s_dir/slkbase.NSF/slkbase
a. Select All Documents.
b. Select General Information.
c. Select Offerings.
d. Select Feature Prerequisites.
e. Select Customer Installation Features Prerequisites.
f. Locate your feature number and OS/400
® release, and check the
prerequisites.
243xx Disk Unit, 71xx Disk Expansion Unit, 71xx Disk Unit Enclosure V5R3

Chapter 2. Replace 43xx disk units
To replace a43xx disk unit, perform these tasks:
__ 1. Perform prerequisite tasks as described in “Before you begin” on page 1.
__ 2. “Open or remove the front cover” on page 29.
Depending on your disk protection, our system or expansion unit can either be
powered off (nonconcurrent) or powered on (concurrent) when you replace the
disk units. Select the procedure you want to use:
v“Replace 43xx RAID or Mirrored protected disk units with system powered on”
v“Replace 43xx RAID or Mirrored protected disk units with system powered off”
on page 8
Replace 43xx RAID or Mirrored protected disk units with system
powered on
Be sure you understand the complexity of the powered on (concurrent) procedure
before you begin. If you do not feel comfortable using the concurrent procedure,
go to “Replace 43xx RAID or Mirrored protected disk units with system powered
off” on page 8.
To replace adisk unit with the system powered on, follow these steps:
__ 1. If possible, use awrist strap to prevent electrostatic discharge from
damaging your hardware. If you do not have awrist strap, touch ametal
surface of the system or expansion unit before installing or replacing
hardware.
If you received the 2209 Disposable Wrist Strap, follow these steps:
__ a. Attach the disposable wrist strap. View video.
__ b. When you unroll the strap, remove the liner from the copper foil at
the end.
__ c. 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 will not
increase or decrease your risk of receiving electric shock when using
or working on electrical equipment.
__ 2. Find the “Disk unit locations” on page 33 for your system unit or your
expansion unit.
__ 3. Remove the disk unit cover. Squeeze the latch and pull out.
Note: iSeries 825 does not have disk unit covers.
__ 4. Be sure you are signed on with at least service level authority.
__ 5. Type strsst on the command line of the OS/400 session and press Enter.
__ 6. Type your service tools user ID and service tools password on the
System Service Tools (SST) Sign On display. Press Enter.
Note: The service tools password is case sensitive.
©Copyright IBM Corp. 2000, 2005 3

__ 7. Select Start aservice tool from the System Service Tools (SST) display. Press
Enter.
__ 8. For mirrored disk units,follow these steps to verify that the disk unit you
are replacing has been suspended before powering off the system:
__ a. Select Work with disk units from the System Service Tools (SST)
display. Press Enter.
__ b. Select Display Disk Configuration from the Work with Disk Units
display. Press Enter.
__ c. Select Display Disk Configuration Status from the Display Disk
Configuration display. Press Enter.
__ d. Does the disk unit that is mirrored to the disk unit that you are
replacing (same unit number) have astatus of Active?
__ No:STOP! Do NOT replace the disk unit. Contact IBM or
your authorized service provider.
__ Yes:Does the disk unit that you are replacing have astatus of
Suspended?
__ Yes:Continue with the next step.
__ No:Follow these steps to suspend mirrored protection
on the disk unit that you are replacing:
1) Press F3 from the Display Disk Configuration display
to return to the Work with Disk Units display.
2) Select Work with Disk Unit Recovery from the Work
with Disk Units display. Press Enter.
3) Select Suspend mirrored protection from the Work
with Disk Unit Recovery display. Press Enter.
4) Select the option to Suspend the disk unit that you
are replacing from the Suspend Mirrored Protection
display. Press Enter.
5) Press F3 to return to the Work with Disk Units
display.
6) Press F3 to return to the System Service Tools (SST)
display.
7) Select Start aservice tool from the System Service
Tools (SST) display.
__ 9. Select Hardware service manager from the Start aService Tool display. Press
Enter.
__ 10. Select Device Concurrent Maintenance from the Hardware Service Manager
display. Press Enter.
__ 11. 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 adisk unit in frame 1(base system), disk unit position 6.
__ 12. Select option 1(Remove device) for the action to be performed.
__ 13. Set the time delay for one minute—01.Do not press Enter at this time.
443xx Disk Unit, 71xx Disk Expansion Unit, 71xx Disk Unit Enclosure V5R3

Note: Locate the light in the numbered arrow by the disk unit you are
replacing. When you press Enter, after aone minute delay, this light
comes on and begins to blink rapidly. You then have nine seconds to
slide the disk unit into place.
__ 14. Press Enter on the console.
__ 15. When the light starts blinking, 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.
__ 16. Support the bottom of the disk unit assembly as you slide it completely
out. Do not hold the disk unit by the handle.
__ 17. The light will stop blinking and remain off when the disk unit is removed.
__ 18. Return to the console and wait until the Concurrent Maintenance Results
display appears.
Press F12.
__ 19. 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.
__ 20. 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. View video.
Chapter 2. Replace 43xx disk units 5

__ 21. 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.
__ 22. The physical locations you entered in step 11 on page 4of this procedure
may 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 would install adisk unit in frame 1(base system), disk unit position 6.
__ 23. Select option 2(Install device) for the action to be performed.
__ 24. 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 aone minute delay, this light
comes on and begins to blink rapidly. You then have nine seconds to
slide the disk unit into place.
__ 25. Press Enter on the console.
__ 26. When the light starts blinking, slide the disk unit all the way in and then
lock it in place by closing the latch.
__ 27. The light stops blinking and remains on when you have installed the disk
unit properly.
__ 28. Return to the console and wait until the Concurrent Maintenance Results
display appears.
Press Enter.
__ 29. When the Hardware Service Manager display appears, press F3.
__ 30. Select Work with Disk Units on the System Service Tools display.
Press Enter.
643xx Disk Unit, 71xx Disk Expansion Unit, 71xx Disk Unit Enclosure V5R3

__ 31. Select Work with disk unit recovery on the Work with Disk Units display.
Press Enter.
__ 32. Does the disk unit that you replaced have device parity protection
(RAID)?
__ No:The disk unit you replaced had mirrored protection.Go to step
33.
__ Yes:Follow these steps:
__ a. Select Rebuild disk unit data on the Work with Disk unit
recovery display.
Press Enter.
__ b. Select 1to rebuild the disk unit displayed (disk unit displayed
is the disk unit that you removed)on the Rebuild Disk Unit
Data display.
Press Enter.
__ c. Press Enter on the Confirm Rebuild Disk Unit Data display. The
rebuild process may take several minutes to complete.
__ d. 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.
__ e. Install or close the system unit or expansion unit front cover.
__ f. Press F5 to refresh the display until the Percent complete
shows 5%.
__ g. 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.
__ h. Press F3 (Exit) to return to the System service tools display.
__ i. Press F3 (Exit) to return to the exit SST display and press Enter.
The replacement procedure is complete.
__ 33. The disk unit you replaced had mirrored protection.Follow these steps:
__ a. Select Replace configured unit on the Work with Disk unit recovery
display.
Press Enter.
__ b. Select the configured disk unit that you are exchanging (suspended
unit) on the Select Configured Unit to Replace display. There should be
only one unit available.
Press Enter.
__ c. Select the disk unit that you just installed on the Select Replacement
Unit display. This unit has anon-configured status.
Note: In some cases, it may take several minutes for anew disk unit
to display. Repeat these steps until the new unit appears.
Press Enter.
__ d. Press Enter on the Confirm Replace of Configured Unit display to
confirm your choice for replacement.
The replacement process may take several minutes to complete.
When the process is complete, the Work with Disk unit recovery
display appears.
__ e. Press F3 (Exit) to return to the Work with disk units display.
__ f. Select Display disk configuration on the Work with disk units display.
Chapter 2. Replace 43xx disk units 7

__ g. Select Display disk configuration status on the Display Disk
Configuration display.
Mirrored status will show Resuming.When complete, the Mirrored
status will show Active.This process may take several minutes to
complete. You can either monitor this display to completion, or press
F3 (Exit) repeatedly to return to the OS/400 main menu.
__ h. 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.
__ i. Install or close the system unit or expansion unit front cover.
The replacement of the disk unit is complete.
Replace 43xx RAID or Mirrored protected disk units with system
powered off
To replace adisk unit with the system powered off, follow these steps:
__ 1. For mirrored disk units,follow these steps to verify that the disk unit you
are replacing has been suspended before powering off the system:
__ a. Be sure you are signed on with at least service level authority.
__ b. Type strsst on the command line of the OS/400 session and press
Enter.
__ c. Type your service tools user ID and service tools password on
the Start Service Tools (STRSST) Sign On display. Press Enter.
Note: The service tools password is case sensitive.
__ d. Select Work with disk units from the System Service Tools (SST)
display. Press Enter.
__ e. Select Display Disk Configuration from the Work with Disk Units
display. Press Enter.
__ f. Select Display Disk Configuration Status from the Display Disk
Configuration display. Press Enter.
__ g. Does the disk unit that is mirrored to the disk unit that you are
replacing (same unit number) have astatus of Active?
__ No:Do NOT replace the disk unit. Contact IBM or your
authorized service provider.
__ Yes:Does the disk unit that you are replacing have astatus of
Suspended?
__ Yes:Continue with the next step.
__ No:Follow these steps to suspend mirrored protection
on the disk unit that you are replacing:
1) Press F3 from the Display Disk Configuration display
to return to the Work with Disk Units display.
2) Select Work with Disk Unit Recovery from the Work
with Disk Units display. Press Enter.
3) Select Suspend mirrored protection from the Work
with Disk Unit Recovery display. Press Enter.
4) Select the option to Suspend the disk unit that you
are replacing from the Suspend Mirrored Protection
display. Press Enter.
__ 2. Press F3 repeatedly to exit System Service Tools and return to the main
menu.
843xx Disk Unit, 71xx Disk Expansion Unit, 71xx Disk Unit Enclosure V5R3

__ 3. Vary off the IXS:
__ a. Go to the Work with Configuration Status display by entering:
WRKCFGSTS at any command line. Press F4.
__ b. At the Work with Configuration Status display, enter *NWS at the Type
field and press Enter two times.
__ c. At the Work with Configuration Status display, select the Vary off
option in the Opt column next to the IXS and press Enter.
__ d. Press F12 to return to the Main Menu.
__ 4. “Power down the system unit” on page 67.
__ 5. If possible, use awrist strap to prevent electrostatic discharge from
damaging your hardware. If you do not have awrist strap, touch ametal
surface of the system or expansion unit before installing or replacing
hardware.
If you received the 2209 Disposable Wrist Strap, follow these steps:
__ a. Attach the disposable wrist strap. View video.
__ b. When you unroll the strap, remove the liner from the copper foil at
the end.
__ c. 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 will not
increase or decrease your risk of receiving electric shock when using
or working on electrical equipment.
__ 6. Remove the disk unit covers. Squeeze the latch and pull out.
Note: iSeries 825 does not have disk unit covers.
__ 7. Locate the disk unit you want to replace.
__ 8. Unlock the handle by squeezing it and pulling it 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.
__ 9. Support the bottom of the disk unit assembly as you slide it completely
out. Do not hold the disk unit by the handle.
Chapter 2. Replace 43xx disk units 9

__ 10. Find the package that contains the new disk unit assembly and remove it
from the static-protective package. Write the serial number (use the last 4
digits) of the disk unit here ______________ before you install it.
Attention: Disk units are fragile. Handle with care.
__ 11. Squeeze and pull the handle 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. Do not hold the disk unit by the
handle. View video.
10 43xx Disk Unit, 71xx Disk Expansion Unit, 71xx Disk Unit Enclosure V5R3

__ 12. Make sure that the disk unit handle is fully extended when sliding into the
system unit or the expansion unit. Support the bottom of the disk unit
assembly as you slide it into the system unit or the expansion unit until it
stops.
__ 13. Close the disk unit handle firmly locking it into place.
__ 14. Install the disk unit covers. Align the tabs on the disk unit enclosure cover
with the slots on the system unit enclosure. Push the cover in until it
latches.
__ 15. Install or close the unit front cover.
__ 16. DANGER
An electrical outlet that is not correctly wired could place hazardous
voltage on metal parts of the system or the products that attach to the
system. It is the customer’s responsibility to ensure that the outlet is
correctly wired and grounded to prevent an electrical shock.
(RSFTD201)
Plug the following power cords into an electrical outlet.
vSystem unit
vSystem unit console
vExpansion units
__ 17. Plug in and power on all attached devices, such as printers and displays.
__ 18. If your system unit is an iSeries 270, 800, or 810, go to step 20.
__ 19. If your system unit is an iSeries 820, 825, 830, 840, 870 or 890, go to step 22
on page 12.
__ 20. Look at the Function/Data display on the control panel. Refer to
“System-unit control panel” on page 43.
__ 21. Does 01 BNV=S appear in the Function/Data display?
Chapter 2. Replace 43xx disk units 11

__ Yes:Go to step 24.
__ No:Follow these steps:
__ a. Press the Increment/Decrement push button until 02 appears
in the Function/Data display.
__ b. Press the Enter push button on the control panel.
__ c. Press the Increment/Decrement push button until Bappears in
the Function/Data display.
__ d. Press the Enter push button on the control panel.
__ e. Press the Increment/Decrement push button until Nappears in
the Function/Data display.
__ f. Press the Enter push button on the control panel.
__ g. Press the Increment/Decrement push button until Sappears in
the Function/Data display.
__ h. Press the Enter push button on the control panel.
__ i. Press the Increment/Decrement push button until 01 appears
in the Function/Data display.
__ j. Press the Enter push button on the control panel.
01 BNSshould appear in the Function/Data display. If it does
not, repeat steps 21a through 21j.
__ k. Go to step 24.
__ 22. Look at the Function/Data display on the control panel.
__ 23. Does 01 BV=S appear in the Function/Data display and the Normal mode
indicator (OK)illuminated?
__ Yes:Continue with the next step.
__ No:Do the following:
__ a. Press the Mode Select button until the Normal mode indicator
(OK)lights up.
__ b. Press the Increment/Decrement push button until 02 appears
in the Function/Data display.
__ c. Press the Enter push button on the control panel.
__ d. Press the Increment/Decrement push button until Bappears in
the Function/Data display.
__ e. Press the Enter push button on the control panel.
__ f. Press the Increment/Decrement push button until Sappears in
the Function/Data display
__ g. Press the Enter push button on the control panel.
__ h. Press the Increment/Decrement push button until 01 appears
in the Function/Data display.
__ i. Press the Enter push button on the control panel.
01 BSshould appear in the Function/Display panel. If it does
not appear, repeat steps 23a through 23i.
__ 24. Press the Power push button that is located on the control panel. There is
approximately a10-second delay before the power-on light comes on, and
data appears in the Function/Data display.
Note: The system takes several minutes to power on and complete an IPL.
When the IPL is complete, the OS/400 signon display should appear
on your system unit console.
__ 25. Follow these steps to verify your disk unit configuration:
12 43xx Disk Unit, 71xx Disk Expansion Unit, 71xx Disk Unit Enclosure V5R3

__ a. Type strsst on the command line of the iSeries session and press
Enter.
__ b. Select Work with disk units from the System Service Tools (SST)
display. Press Enter.
__ c. Select Work with disk unit recovery from the Work with Disk Units
display. Press Enter.
__ d. Does the disk unit that you replaced have device parity protection
(RAID)?
__ No:The disk unit you replaced had mirrored protection.Go
to step 26.
__ Yes:Follow these steps:
__ 1) Select Rebuild disk unit data on the Work with Disk
unit recovery display.
Press Enter.
__ 2) Select 1to rebuild the disk unit displayed (disk unit
displayed is the disk unit that you removed)on the
Rebuild Disk Unit Data display.
Press Enter.
__ 3) Press Enter on the Confirm Rebuild Disk Unit Data
display. The rebuild process may take several minutes
to complete.
__ 4) 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.
__ 5) Install or close the system unit or expansion unit front
cover.
__ 6) Press F5 to refresh the display until the Percent
complete shows 5%.
__ 7) 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.
__ 8) Press F3 (Exit) to return to the System service tools
display.
__ 9) Press F3 (Exit) to return to the exit SST display and
press Enter.
The replacement procedure is complete.
__ 26. The disk unit you replaced had mirrored protection.Follow these steps:
__ a. Select Replace configured unit on the Work with Disk unit recovery
display.
Press Enter.
__ b. Select the configured disk unit that you are exchanging (suspended
unit) on the Select Configured Unit to Replace display. There should be
only one unit available.
Press Enter.
__ c. Select the disk unit that you just installed on the Select Replacement
Unit display. This unit has anon-configured status.
Note: In some cases, it may take several minutes for anew disk unit
to display. Repeat these steps until the new unit appears.
Chapter 2. Replace 43xx disk units 13

Press Enter.
__ d. Press Enter on the Confirm Replace of Configured Unit display to
confirm your choice for replacement.
The replacement process may take several minutes to complete.
When the process is complete, the Work with Disk unit recovery
display appears.
__ e. Press F3 (Exit) to return to the Work with disk units display.
__ f. Select Display disk configuration on the Work with disk units display.
__ g. Select Display disk configuration status on the Display Disk
Configuration display.
Mirrored status will show Resuming.When complete, the Mirrored
status will show Active.This process may take several minutes to
complete. You can either monitor this display to completion, or press
F3 (Exit) repeatedly to return to the OS/400 main menu.
__ h. 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.
__ i. Install or close the system unit or expansion unit front cover.
The replacement of the disk unit is complete.
14 43xx Disk Unit, 71xx Disk Expansion Unit, 71xx Disk Unit Enclosure V5R3