Yes as I have mentioned earlier your DL360 Gen9 using H241 HBA which is actually supported with MSA 1050 so this is working fine.
But in case of DL260 Gen8 you are using P431 which is actually not supported with MSA 1050 as per the HPE SPOCK so this could be the reason that this is not working
I would suggest to refer the HPE SPOCK link which I have given and identify any supported HBA and use it in DL360 Gen8 server
Hope this helps!
Regards
Subhajit
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