After partitioning the disks when I installed Oracle Enterprise Linux 5.7 64bit, it gave me the following error message:
“Your boot partition is on a disk using the GPT partitioning scheme but this machine cannot boot using GPT”.
I searched the solution on the net, and someone said the protected MBR GPT partition entire needs to be deleted.
So I entered the rescue mode and deleted the MBR on the disks as below.
# dd if=/dev/zero of=/dev/sda bs=512 count=1
I reinstalled the system again, it worked.
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