IBM 2145-4F2, Installation Manual

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Volume Controller node, a UPS that is not connected to an active SAN
Volume Controller node does not shut off within the five-minute required
period.
Important: Data integrity can be compromised by pushing the 2145 UPS power-off
button or the 2145 UPS-1U on/off button. However, in the case of an
emergency, you can manually shut down the UPS by pushing the 2145
UPS power-off button or the 2145 UPS-1U on/off button. Never shut
down a UPS without first shutting down the SAN Volume Controller
node that it supports.
If you have two SAN Volume Controller 2145-4F2 nodes that use 2145
UPSs in the same I/O group, you must connect these nodes to
different 2145 UPSs. This configuration ensures that cache and cluster
state information is protected in the event of a failure of either the UPS
or the mainline power source.
When SAN Volume Controller nodes are added to the cluster, you must specify the
I/O group that they are joining. The configuration interfaces check the UPS units
and ensure that the two SAN Volume Controller nodes in the I/O group are not
connected to the same UPS units.
Controls and indicators for the 2145 UPS-1U
All controls for the 2145 uninterruptible power supply-1U (2145 UPS-1U) are
located on the front panel assembly.
1
Power-on indicator
2
On/off button
3
Test and alarm reset button
4
Overload indicator
5
On-battery indicator
6
Service indicator
7
Load segment 1 indicator
8
Load segment 2 indicator
+ - + -
LOAD 1 LOAD 2
1
yy
zvm
5 6
7
8
1
2
3
4
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IBM System Storage SAN Volume Controller: Installation Guide