2. Check the condition of the inside of the machine for any metal or other
contaminants, or any indications of water, other fluid, fire, or smoke damage.
3. Check for any obvious mechanical problems, such as loose components.
4. Check any exposed cables and connectors for wear, cracks, or pinching.
Checking the grounding of a SAN Volume Controller, the UPS,
and the redundant ac power switch
Ensure that you understand how to check the grounding of a SAN Volume
Controller, the uninterruptible power supply (UPS), and the optional redundant ac
power feature.
All SAN Volume Controller models support the use of the 2145 uninterruptible
power supply-1U (2145 UPS-1U) and the optional redundant ac power switch. The
SAN Volume Controller 2145-4F2 also supports the use of the 2145 UPS.
Perform the following steps to test the grounding of a SAN Volume Controller.
Follow the steps for the SAN Volume Controller configuration you are using.
Before you start, confirm you know the SAN Volume Controller model type, the
UPS type, and whether you are using redundant ac power. Note 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: Service Guide.
2. If the UPS is a 2145 UPS, ensure that other SAN Volume Controller nodes that
are powered from the UPS are powered off.
3. Use the power button to power off the UPS.
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
v The serial cable that is connected to the UPS.
5. Disconnect all signal cables from the UPS. If the UPS is a 2145 UPS, there
might be multiple signal cables.
6. If the UPS 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 UPS power cable from the
site power distribution unit.
8. If redundant ac power is used, power 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 UPS input power cable.
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