UEFI vs BIOS and vTPM in EDIS Global VPS

​

🆕 UEFI, BIOS & vtpm overview

EDIS Global VPS supports both BIOS (legacy boot) and UEFI (modern boot), as well as vTPM (software-based Trusted Platform Module). These options are primarily relevant for operating system compatibility, especially for modern systems like Windows 11.

---

​

🧭 BIOS vs UEFI

​

🟢 BIOS (Default)

• Legacy boot mode
• Maximum compatibility
• Works with all supported operating systems
• Recommended for most Linux installations

👉 Default setting on all VPS

---

​

🔵 UEFI

• Modern boot standard
• Required for newer operating systems
• Supports advanced features like Secure Boot

Required for:

• Windows 11
• Windows Server 2025

---

​

🔐 What is vTPM?

vTPM (Virtual Trusted Platform Module) is a software emulation of a TPM chip. It is required for:

• Windows 11 installation
• Certain OS security features (disk encryption, secure boot chains)

​

Options

• None (Default) → TPM disabled
• Software TPM → TPM enabled

👉 Only enable vTPM if your operating system requires it

---

​

⚙️ Default Configuration

To ensure maximum compatibility:

• Boot Mode: BIOS
• TPM: Disabled

These defaults are suitable for the majority of use cases.

---

​

🤖 Auto-Installer Behavior

When using EDIS Global Auto-Installers:

• BIOS / UEFI is automatically selected
• TPM is enabled or disabled as required

👉 Manual settings are ignored to ensure successful installation

---

​

🧩 When manual configuration matters

Manual BIOS / UEFI / TPM settings are relevant when:

​

✔️ Custom Cloud-Init images

• You can:
  • Use current VPS settings, or
  • Override boot mode and TPM during deployment

---

​

✔️ Custom ISO / uploaded images

• VPS will use the System Configuration settings
• If needed:
  1. Change Boot Mode / TPM
  2. Power-cycle the VPS
  3. Boot your image

---

​

⚠️ Important Considerations

​

OS Compatibility

• A significant number of operating systems are not UEFI-compatible
• Switching from BIOS → UEFI on an existing installation will usually result in:
  • ❌ Boot failure

---

​

Changing boot mode

• Boot mode must match how the OS was installed
• Changing it later requires:
  • Reinstallation, or
  • Advanced manual recovery

---

​

TPM Usage

• Not required for Linux in most cases
• Only enable when explicitly needed
• Adds complexity without benefit if unused

---

​

🧾 Quick Recommendations

• Use BIOS + no TPM for:
  • Linux servers
  • General-purpose workloads
• Use UEFI + TPM only for:
  • Windows 11 / modern Windows deployments

---

​

🧭 Summary

---

If you are unsure which configuration to use, the Auto-Installer will always choose the correct setup automatically.