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Internal Boot FAQ (7.3+)

This page contains frequently asked questions about internal boot in Unraid OS. For general licensing questions, see the Licensing FAQ. For TPM-based licensing questions, see the TPM Licensing FAQ (7.3+).

If you'd rather watch a step-by-step walkthrough, these videos cover both common internal boot paths.

New server setup

Existing server conversion

为什么我会使用内部启动而不是 USB 闪存盘？​

内部启动是可选的。如果你的 USB 闪存启动方案足够可靠，并且适合你的服务器，那么你不必因为有了内部启动就切换。

内部启动解决了几个实际问题：

  • 它减少了对 USB 闪存介质的依赖。内部 SSD、NVMe 或 eMMC 设备通常比廉价的 USB 闪存盘更耐用，也不太容易被碰到、移除或损坏。
  • 它支持镜像启动设备。使用两个内部启动设备时，如果其中一个设备发生故障，Unraid 仍可继续启动。
  • 对于 USB 启动不方便、暴露、可靠性不足或硬件设计不偏向 USB 启动的系统，它的效果更好。
  • 它允许你为仅用于启动的设备选择一个专用启动池，或者在你想为启动保留较大设备的一部分，并将剩余容量用作普通存储池时，选择一个启动+数据池。

内部启动不会让阵列在正常运行时更快，而且对于已经能稳定从 USB 启动的服务器来说，也不是必需的。

I switched from flash boot to internal boot, but the system still boots from flash. What should I do?​

Unraid attempts to update the UEFI boot order automatically. If that does not take effect, manually move your internal boot device(s) to the top of your BIOS/UEFI boot order, save changes, and reboot.

What should I do if I see "prohibited by secure boot policy" after enabling internal boot?​

Disable Secure Boot in your BIOS/UEFI settings, then reboot.

Does an internal boot SSD or NVMe device count toward my attached storage device limit?​

Yes. Internal boot SSD/NVMe devices count toward your attached device limit.

Unraid does not currently exclude internal boot drives from the attached device count. If you use mirrored internal boot, both boot devices count.

Specifically, attached storage devices include all devices present before array start, except one eMMC device and one USB device. See Licensing FAQ.

Can I configure internal boot with two SSDs in a mirrored setup for redundancy?​

Yes. Mirrored internal boot is supported by default.

Internal boot uses ZFS, and a mirrored setup uses a ZFS mirror for redundancy. If one boot drive fails, Unraid continues running in a degraded state. Replace the failed device through the normal Unraid drive assignment flow to restore the mirror.

Can I enable internal boot and still license from flash?​

Yes. The licensing method is independent of the boot method.

For TPM-based licensing details, see the TPM Licensing FAQ (7.3+).

如果我使用内部启动，闪存备份是如何工作的？​

先使用 Unraid USB Flash Creator 将备份恢复到 USB 闪存驱动器，然后从该已恢复的 USB 设备启动。

服务器启动后，前往 设置 → Onboarding Wizard，选择 内部启动，并完成切换。在此过程中，Unraid 会将已恢复的启动配置复制到所选的内部启动设备。

你不需要手动将闪存备份文件放入内部启动分区。

有关完整的备份和恢复步骤，请参阅 自动闪存备份。