So basically you want to create 3 volumes from Single Pool and that may be either from Pool A or Pool B. Yes you can do the same.
As you have mentioned you want to store OS image in one of the volume so your requirement would be Boot from SAN implementation. Please find the HPE links which may give more details,
https://h20195.www2.hpe.com/V2/getpdf.aspx/4AA4-7060ENW.pdf?
https://h20195.www2.hpe.com/v2/getpdf.aspx/A00015961ENW.pdf?
https://support.hpe.com/hpsc/doc/public/display?docId=emr_na-c01861120
After you present MSA volumes at the ESX box, then you need to deal those volumes as per your requirement. It means you need to decide whether you want to use them as raw LUN (RDM) or you want use them with VMFS filesystem and use it as Datastore. These parts purely OS specific.
Hope this helps!
Regards
Subhajit
I am an HPE employee
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