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  3. November 2005

UPS attachment problem on i5 520

As a heads up-

If you:

1) have an i5 520 with UPS cable attached
2) apply an FSP PTF (these are the 5722-999 ones that start with "MH")
3) Do a PWRDWNSYS RESTART(*YES)

Then your UPS cable is no longer recognized by the i5 and you are _not_
protected by any user written program that monitors the UPS.  You have to do
a cold start to get it rerecognized.

And there is no way, per IBM, for we the end users to check for that problem
via the ASM, SST, or user program.  It requires a CE.  (Although I don't
know if those of you with HMCs have a way to check it.)

IBM is working on 1) a PTF to fix the problem, and 2) a way for the end user
to check for proper UPS attachment.

I do not know whether this affects any systems other than the 520.

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