IBM SAN Volume Controller, Hardware Maintenance Manual

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the SAN Volume Controller model type, the uninterruptible power-supply type, and whether you are
using redundant ac power. Determine the location of the signal cables that are attached to the SAN
Volume Controller.
When you are asked to test the grounding continuity, use your local procedures to perform the test. The
test is successful if the measured resistance is 0.1 ohm or less.
Attention: Some electrical circuits can be damaged if the external signal cables are present at the SAN
Volume Controller while it is undergoing a grounding test.
1. Ensure that the SAN Volume Controller node is powered off. See MAP 5350: Powering off a SAN
Volume Controller node in the
IBM System Storage SAN Volume Controller 2145 Troubleshooting Guide .
2.
If the uninterruptible power supply is a 2145 UPS, ensure that other SAN Volume Controller nodes
that are powered from the uninterruptible power supply are powered off.
3. Use the power button to power off the uninterruptible power supply.
4.
Disconnect all signal cables from the SAN Volume Controller node, which includes the following
cables:
v
The fibre-channel cables
v
The Ethernet cable or cables
v The serial cable that is connected to the uninterruptible power supply
5. Disconnect all signal cables from the uninterruptible power supply. If the uninterruptible power
supply is a 2145 UPS, there might be multiple signal cables.
6.
If the uninterruptible power supply is a 2145 UPS, disconnect any power cables that are connected to
SAN Volume Controller nodes, except the one that is being tested.
7. If redundant ac power is not used, disconnect the uninterruptible power-supply power cable from
the site power-distribution unit.
8.
If redundant ac power is used, turn off any SAN Volume Controller that is being supplied from the
redundant ac-power switch, and remove the power cable to this system from the redundant
ac-power switch.
9. If redundant ac power is used, disconnect both input power leads from the site power distribution
units.
10. If redundant ac power is not used, test the grounding continuity between a conductive area on the
SAN Volume Controller frame and the ground pin on the plug of the uninterruptible power-supply
input-power cable.
11.
If redundant ac power is used, test the grounding continuity between a conductive area on the SAN
Volume Controller frame and the ground pin on the plug of the main power cable of the redundant
ac-power switch. If the test is successful, test the grounding continuity between a conductive area on
the SAN Volume Controller frame and the ground pin on the plug of the backup power cable of the
redundant ac-power switch. Both tests must be successful.
12. After you have completed testing the grounding continuity, perform one of the following procedures,
depending on the outcome of the test.
v
If the test is successful, reconnect any cables that were removed, and power on any
uninterruptible power-supply units and SAN Volume Controller nodes that were powered off.
v If the test was not successful, ensure that all cables are securely connected. If the test still fails, test
the individual system components. Before you test the individual components, remove all cables
from the components. If any component test fails, replace the component. After each component
has been tested and the failing ones have been replaced, repeat the complete system test by
returning to step 1.
Test the components in the following order:
a.
The SAN Volume Controller node, from the frame to the ground pin of the input power
receptacle
Safety and environmental notices
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