Internal Device Checks; Checking The Grounding Of San Volume Controller, The Uninterruptible Power Supply, And The Redundant Ac-Power Switch; Power-Supply - IBM SAN Volume Controller 2145-CG8 Hardware Maintenance Manual

Internal device checks

Ensure that you perform an internal device check before you install or service SAN Volume Controller.
To conduct the internal device check, perform the following steps:
1. Check for any non-IBM changes that might have been made to the device. If any are present, obtain
the "Non-IBM Alteration Attachment Survey," form number R009, from the IBM branch office.
Complete the form and return it to the branch office.
2. Check the condition of the inside of the device 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 SAN Volume Controller, the uninterruptible
power supply, and the redundant ac-power switch
Ensure that you understand how to check the grounding of a SAN Volume Controller, the uninterruptible
power supply, and the optional redundant ac-power switch feature.
To test the grounding of a SAN Volume Controller node, perform the following steps. Follow the steps
for the SAN Volume Controller configuration that you are using. Before you start, confirm that you know
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 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.
xviii
IBM SAN Volume Controller Hardware Maintenance Guide