Lenovo 7Y43, Service Manual

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Chapter 6. Hot-swapping or replacing an IOM12 module
Your system configuration determines whether you can perform a nondisruptive IOM12 module hot-swap or
a disruptive IOM12 module replacement when an IOM12 module fails. When an IOM12 module fails, the
system logs a warning message to the system console indicating which IOM12 module has failed. In
addition, the attention (amber) LED on the operator display panel and the attention (amber) LED on the failed
IOM12 module illuminate.
Before you begin
All other components in the system, including the other IOM12 module, must be functioning properly.
About this task
• For multipathed (multipath HA or multipath) and quad-pathed (quad-path HA or quad-path)
configurations, you can hot-swap an IOM12 module (nondisruptively replace an IOM12 module in a
system that is powered on and serving data—I/O is in progress).
• Best practice is to have the current versions of disk shelf (IOM) firmware and disk drive firmware on your
system before adding new disk shelves, shelf FRU components, or SAS cables. Current versions of
firmware can be found on the Lenovo Support Web site.
Lenovo Data Center Support
• Disk shelf (IOM) firmware is automatically updated (nondisruptively) on a new IOM12 module with a non
current firmware version.IOM firmware checks occur every ten minutes. An IOM firmware update can take
up to 30 minutes.
• If needed, you can turn on the disk shelf's location (blue) LEDs to aid in physically locating the affected
disk shelf:
storage shelf location-led modify -node
node_name
-shelf-name
shelf_name
-led-status
on
A disk shelf has three location (blue) LEDs: one on the operator display panel and one on each IOM12
module. Location LEDs remain illuminated for 30 minutes. You can turn them off by entering the same
command, but using the
off option.
• If needed, you can refer to the Monitoring disk shelf LEDs section for information about the meaning and
location of disk shelf LEDs on the operator display panel and FRU components.
Step 1. Properly ground yourself.
Step 2. Unpack the new IOM12 module, and set it on a level surface near the disk shelf.Save all packaging
materials for use when returning the failed IOM12 module.
Step 3. Physically identify the failed IOM12 module from the system console warning message and the
illuminated attention (amber) LED on the failed IOM12 module.
Step 4. Perform one of the following actions based on the type of configuration you have:
If you have a...
Then...
Multipath HA, multipath,
quad-path HA, or quad-path
configuration
Go to the next step.
Step 5. Disconnect the cabling from the IOM12 module that you are removing.Make note of the IOM12
module ports each cable is connected to.
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