Chapter 5 FC Module FRUs 5-3
5.1.2 Removing an I/O Controller Module
1. Keep the array powered on, and make sure that the connected hosts are inactive.
Note – Most users who have multiple host connections between the two controllers
use multi-pathing software to manage them. If multi-pathing software and
connectivity are not possible, one alternative is to power off the array and
discontinue all host I/O until the replacement is completed and the array is powered
on. See “Powering Off the Array” on page 1-5 for important instructions about
powering off an array.
2. Write down the cabling configuration for the controller-to-host connections and
expansion unit connections so that you can reconnect the cables correctly with the
new I/O controller module. See
FIGURE 5-1 and FIGURE 5-2.
3. Remove all cables from the I/O controller module.
4. Turn the thumbscrews on the left and right sides of the I/O controller module
counterclockwise until the thumbscrews are disengaged from the chassis.
5. Hold the thumbscrews, and pull out the I/O controller module.
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