Coexistence of Centos on Ventoy and Reserved Partitions

[nguyen ha thai trong]

Step 1: Update ventoy, don't worry because it won't lose existing data, just replace mbr
       
Step 2 :
In a similar topic:
使用gurb2 启动 ventory


Longpanda advised:

对于 Legacy BIOS 模式:
chainloader (hd1)+1
boot

对于 UEFI 模式:
chainoader (hd1,2)/efi/boot/grubx64_real.efi
boot