ESX Server 3.0.x/3.5/3i Boot Process

ESX Server 3.0.x/3.5 Boot Process

  1. Boot loader in MBR points to the boot device
  2. Grub.conf lists the boot menu options.
  3. Selected menu provides:
  • Location of root partition. Uses UUID instead of device

    name (e.g. /dev/sda)
  • RAM Disk file name relative to /boot location

ESX Server 3i Boot Process



  • Boot loader in MBR points to the boot device
  • initrd (initial Ram disk) is loaded

ESXi Boot Sequence

ESXi firmware boot starts from grub screen

  1. Hypervisor loads necessary drivers
  2. Hypervisor runs config scripts
  3. Hypervisor starts daemons (services)
  4. Boot process ends when DCUI screen is loaded
  • Alt+F2 : DCUI (Default)
  • Alt+F1: inactive console
  • Alt+F11 : Summary information (version, server, CPU, memory)
  • Alt+F12 : vmkernel log

About Prasenjit Sarkar

Prasenjit Sarkar is a Product Manager at Oracle for their Public Cloud with primary focus on Cloud Strategy, Oracle Openstack, PaaS, Cloud Native Applications and API Platform. His primary focus is driving Oracle’s Cloud Computing business with commercial and public sector customers; helping to shape and deliver on a strategy to build broad use of Oracle’s Infrastructure as a Service (IaaS) and Platform as a Service (PaaS) offerings such as Compute, Storage, Java as a Service, and Database as a Service. He is also responsible for developing public/private cloud integration strategies, customer’s Cloud Computing architecture vision, future state architectures, and implementable architecture roadmaps in the context of the public, private, and hybrid cloud computing solutions Oracle can offer.

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