Administrator responsibilities, in case of power outage?

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01-24-2011

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Administrator responsibilities, in case of power outage?

Hi guys,

I was wondering if you could share some of your knowledge, in the event of a power outage.
Let presume you are on duty and you get a call at midnight because half of your cabinets have no power, air conditioning is down and you deal with a ton of 500 error messages on your boxes.

What would you do, in this situation? From my very small experience, I would do this:
Make sure all vital boxes with sensitive data get an UPS source hooked ASAP, so they can be shut gracefully. Once the power supply is restored, I would check each system for errors and restore corrupted data from backup, if any.

I would appreciate if you could give me an example how would you deal with this situation, in a more appropriate manner. My goal is to find out what would you do, before the power issues are solved. Thanks for sharing your experience.

TECK

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LEARN ABOUT MOJAVE

pow

POW(3)							   BSD Library Functions Manual 						    POW(3)

NAME

     pow -- power function

SYNOPSIS

     #include <math.h>

     double
     pow(double x, double y);

     long double
     powl(long double x, long double y);

     float
     powf(float x, float y);

DESCRIPTION

     The pow() functions compute x raised to the power y.

SPECIAL VALUES

     pow(+-0, y) returns +-infinity and raises the "divide-by-zero" floating-point exception for y an odd integer < 0.

     pow(+-0, y) returns +infinity and raises the "divide-by-zero" floating-point exception for y < 0 and not an odd integer.

     pow(+-0, y) returns +-0 for y an odd integer > 0.

     pow(+-0, y) returns +0 for y > 0 and not an odd integer.

     pow(-1, +-infinity) returns 1.

     pow(1, y) returns 1 for any y, even a NaN.

     pow(x, +-0) returns 1 for any x, even a NaN.

     pow(x, y) returns a NaN and raises the "invalid" floating-point exception for finite x < 0 and finite non-integer y.

     pow(x, -infinity) returns +infinity for |x| < 1.

     pow(x, -infinity) returns +0 for |x| > 1.

     pow(x, +infinity) returns +0 for |x| < 1.

     pow(x, +infinity) returns +infinity for |x| > 1.

     pow(-infinity, y) returns -0 for y an odd integer < 0.

     pow(-infinity, y) returns +0 for y < 0 and not an odd integer.

     pow(-infinity, y) returns -infinity for y an odd integer > 0.

     pow(-infinity, y) returns +infinity for y > 0 and not an odd integer.

     pow(+infinity, y) returns +0 for y < 0.

     pow(+infinity, y) returns +infinity for y > 0.

     A domain error occurs if x is finite and negative and y is finite and not an integer.

     A domain error can occur if x is 0 and y less than or equal to 0.

     Range errors may occur.

VECTOR OPERATIONS

     If you need to apply the pow() functions to SIMD vectors or arrays, using the following functions provided by the Accelerate.framework may
     give significantly better performance:

     #include <Accelerate/Accelerate.h>

     vFloat vpowf(vFloat x, vFloat y);
     vFloat vpowf(vFloat x, vSInt32 y);
     void vvpowf(float *z, const float *y, const float *x, const int *n);
     void vvpow(double *z, const double *y, const double *x, const int *n);
     void vvpowsf(float *z, const float *y, const float *x, const int *n);
     void vvpows(double *z, const double *y, const double *x, const int *n);

SEE ALSO

     exp(3) math(3)

STANDARDS

     The pow() function conforms to ISO/IEC 9899:2011.

4th Berkeley Distribution					 December 11, 2006					 4th Berkeley Distribution