To answer your questions,
1: if one of controller fail does the second will take care of both pool
>> Yes if one controller fail then other controller will take care of the VDGs part of failed controller
2: the spare disk will be spare for two pool? or i need to had spare hdd for eatch poll
>> Spare gets configured at the system level. It's not for any Pool or VDG. So if you have Global spare or Dynamic spare configured then anywhere if drive failed and similar applicable drive already configured as spare then it will participate in reconstruction.
Hope this helps!
Regards
Subhajit
I am an HPE employee
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