2nd disk add in RHEL become primary in Vcenter

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Hi Guys,


I am facing a weired issue , I am using RHEL 8 . When i add 2nd disk from vcenter in power off RHEl 8 VM , and turn of . i am getting “OS not found error”

To fix this issue i have to change boot order in BIOS. I make 2nd disk as primary in bios then save the setting . After that , i am able to boot the machine.


Can anybody help me why primary disk in becoming secondary in BIOS and OS as well ?

I am using Vcenter 6.5 and OS is RHEL8

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