information to retain to avoid data corruption when adding the node back to the cluster, how to ensure
that the multipathing device driver does not rediscover any paths that are manually removed, and for
other considerations regarding dependent volumes.
For more information about working with dependent volumes, see the following topics:
v "Listing node-dependent VDisks (volumes) using the CLI" in the IBM System Storage SAN Volume
Controller Troubleshooting Guide
v "lsnodedependentvdisks" command description in the IBM System Storage SAN Volume Controller and
IBM Storwize V7000 Command-Line Interface User's Guide
Preparing to remove and replace parts
Before you remove and replace parts, you must be aware of all safety issues.
First, read the safety precautions in the IBM System Storage SAN Volume Controller Safety Notices. These
guidelines help you safely work with the SAN Volume Controller, redundant ac-power switch, and
uninterruptible power supply.
Working inside the node with the power on
When you are servicing the SAN Volume Controller node, you might need to turn on the node while the
cover is off.
Attention: Static electricity that is released to internal components when the node is turned on might
cause the node to halt, which might result in the loss of data. To avoid this potential problem, always use
an electrostatic-discharge wrist strap or other grounding system when you work inside the node with the
power on.
You might be instructed to turn on the node and look at system-board LEDs while the cover is off.
Follow these guidelines when you work inside a node that is turned on:
v Avoid wearing loose-fitting clothing on your forearms. Button long-sleeved shirts before working
inside the server; do not wear cuff links while you are working inside the node.
v Do not allow your necktie or scarf to hang inside the node.
v Remove jewelry, such as bracelets, necklaces, rings, and loose-fitting wrist watches.
v Remove items from your shirt pocket, such as pens and pencils, that could fall into the node as you
lean over it.
v Avoid dropping any metallic objects, such as paper clips, hairpins, and screws, into the node.
Removing and replacing SAN Volume Controller parts
The remove and replace procedures for the SAN Volume Controller field replaceable units are described
in the topics that follow.
Removing the cable-management arm
You can remove the 2145-CF8 and 2145-CG8 cable-management arm from the rack.
Removing the 2145-CG8 and 2145-CF8 cable-management arm
Remove the cable-management arm that routes and secures the power cables and other cables.
Figure 9 on page 27 shows the items that you need to install the SAN Volume Controller 2145-CG8 or
2145-CF8 node in a rack.
26 IBM SAN Volume Controller Hardware Maintenance Guide
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