DataQ..Force to auxiliary storage

Hi All,
I have some queries regarding dataq.
1. what will happen to the data in dataq on abnormal ending of system
2. if we give "Force to auxiliary storage" yes how will it affect the
performance....
if  it is No does it move data to Disk later?
3 I red that Dataq will remain in main memory (reason for fast access)...On
IPL what happens to DataQ

Any thought on this

Cheers
Manoj S.T
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