IBM SAN256B-6, Installation, Service And User Manual

Page: 184 / 292

Cold-swap replacement
About this task
Use this procedure When you can interrupt system operation and replace one or both WWN cards with
the system powered down. You can replace one WWN card or both WWN cards, one at a time, with
system power on using steps under “Hot-swap replacement” on page 154.
Note: Be aware that if replacing both WWN cards, the IP addresses on the new WWN cards will be in
effect when the device powers up. If these IP addresses are different from the previous cards, then you
will not be able to establish ssh or other sessions that use the previous IP addresses. You can change IP
addresses on the new cards using the
ipaddrset command.
Procedure
1.
Unpack the replacement WWN card assembly and save the packaging for the faulty WWN card(s).
The WWN card assemblies are labeled #1 for the left slot and #2 for the right slot.
2. Perform the following steps.
a. Log in to the device and execute the
switchcfgpersistentdisable
command on the main switch
and other logical switches. The
switchcfgpersistentdisable
command disables the switches, and
ensures they remain disabled after the power is cycled. This allows you to check all the settings
so that you can verify the settings before placing the device back into production.
switch:admin> switchcfgpersistentdisable
Switch’s persistent state set to ’disabled’
If there are other logical switches on your chassis, use the setcontext command to connect to all
the other switches and then run switchcfgpersistentdisable on these switches as well.
3. Enter the sysShutdown command. When command output indicates that the device has completed
shut-down, remove power cords from all power supply assemblies.
4.
Remove defective WWN card assemblies using steps under “Removing the WWN card and bezel”
on page 157, and then continue with step 5.
Note: There are two WWN card assemblies located behind the WWN bezel (logo plate). As you are
facing the bezel, WWN 1 is located on the left side, and WWN 2 is on the right.
5. Install replacement WWN card assemblies into the empty slot using the following steps:
a. Holding the card assembly by its edges with both hands along its length, slide it into the device
slot.
b. Push with your thumb on the end of assembly to fully seat into the backplane connector.
c. Use a #1 Phillips screwdriver to tighten the captive screw and secure the card assembly to the
chassis.
Note: Be sure that captive screws are tightened. If not, high pressure from fan operation may
unseat cards from chassis connectors.
6. Power on the device and wait for five minutes for the device to boot.
7. Verify that new WWN cards are correctly connected by checking LED function. For details on LED
operation, refer to “Interpreting WWN card LEDs” on page 92.
Note: The LEDs may take up to two minutes after WWN card installation to begin functioning.
8. Resolve any issues flagged by RASlog EM-1220 and EM-1222 messages that display for the new
card(s) before proceeding.
Note: Issues relating to data recovery on new WWN cards must be resolved at this point before
proceeding to avoid invalid WWN data, errors, and operating problems.
9. Determine the active CP blade by entering the
haShow
command.
156
SAN256B-6 Installation, Service, and User Guide
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