IBM SAN256B-6, Installation, Service And User Manual

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1 - WWN card 1
2 - WWN card 2
Precautions specific to WWN cards
Observe the following precautions for these cards:
v Wear an appropriately grounded ESD wrist strap when handling and installing device blades and
cards. Follow electrostatic discharge (ESD) precautions. Wear a wrist grounding strap connected to
chassis ground (if the chassis is plugged in) or a bench ground.
v The device will operate with one WWN card, but will be in degraded condition. If you have removed
a card, be sure to replace as soon as possible.
Note: Do not use steps in the WWN card and WWN card bezel removal procedures to disable logical
switches and power down the device.
CAUTION:
For safety reasons, the ESD wrist strap should contain a series 1 megaohm resistor.
CAUTION:
Static electricity can damage the chassis and other electronic devices. To avoid damage,
keep static-sensitive devices in their static-protective packages until you are ready to
install them.
WWN card fault indicators
Before replacing a WWN card, verify that the replacement is necessary. Any of the following events can
indicate that cards require replacement:
Figure 63. WWN card location and numbering
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SAN256B-6 Installation, Service, and User Guide
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