Power Led On The San Volume Controller - IBM SAN Volume Controller Hardware Maintenance Manual

The power-cable assembly is composed of a power cable (two power cables in the SAN Volume
Controller model 2145-CF8) and a signal cable that are bound together. You can remove the power-cable
assembly if you have problems with the power supply and suspect that a power or signal cable is
defective. When removing the power-cable assembly, ensure that you also remove it from the
uninterruptible power supply.
Perform the following steps to remove the power-cable assembly:
1. Check the SAN Volume Controller models 2145-CF8, 2145-8A4, 2145-8G4, 2145-8F4, and 2145-8F2
power LED ( 1 in Figure 93).
v If the light is on, go to step 2.
v If the light is either off or flashing, power has already been removed from the SAN Volume
Controller. Go to step 7 on page 94.
1
2145-CF8
Figure 93. Power LED on the SAN Volume Controller models 2145-CF8, 2145-8A4, 2145-8G4, and 2145-8F4 or
2145-8F2 operator-information panel
1 Power LED
Important: SAN Volume Controller nodes operate in pairs. Both SAN Volume Controller nodes are
in the same I/O group. One SAN Volume Controller must be operational if you are servicing the
other SAN Volume Controller. If both SAN Volume Controller nodes are not functioning, you cannot
access any of the disks in that I/O group.
2. Turn off the node while ensuring that its data is mirrored and synchronized. See MAP 5350 in the
IBM System Storage SAN Volume Controller 2145 Troubleshooting Guide for more information.
Attention: If both SAN Volume Controller nodes are online, removing the power from one SAN
Volume Controller causes some performance degradation because I/O operations are automatically
rerouted through the other SAN Volume Controller. You must obtain customer agreement before you
continue with this procedure.
3. Press and release the SAN Volume Controller models 2145-CF8, 2145-8A4, 2145-8G4, 2145-8F4, and
2145-8F2 power-control button 1 , as shown in Figure 94 on page 94. Wait one minute for the SAN
Volume Controller to turn off. The other SAN Volume Controller nodes in the cluster might display
an error code indicating that a node is missing from the cluster. Ignore this error code; it is
automatically resolved when the repair is complete.
1
2145-8A4 2145-8G4
1 1
2145-8F4
2145-8F2
Chapter 2. Removing and replacing parts
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