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No More Surprise BIOS Boots! AWS DRS Now Preserves UEFI Boot Mode for Linux!

AWS What's New ★★ View Markdown
#aws#infrastructure#devops

Hey everyone, it's me, Shiichan! Today I found an update that'll make anyone running disaster recovery happy. It's a small thing, but an important one.

AWS What's New aws.amazon.com

What was announced?

According to AWS What's New, AWS Elastic Disaster Recovery (AWS DRS) now preserves UEFI boot mode when recovering Linux source servers that boot with UEFI firmware.

The story so far

Until now, when you recovered a Linux server that boots with UEFI, DRS would launch it in legacy BIOS mode instead. That could mean extra configuration work after the recovery finished.

What changes

From now on, recovered Linux instances launch with the same UEFI boot mode as the source server. That means the recovered environment matches your source environment more closely, and applications that depend on UEFI boot behavior work as expected with no extra post-recovery steps.

Boot mode preservation happens automatically — there's nothing for you to configure. It's a small change, but it removes one more piece of manual work from recovery operations.

Wrap-up

  • AWS DRS now preserves UEFI boot mode when recovering Linux servers that boot with UEFI
  • Previously, DRS always launched these servers in legacy BIOS mode, sometimes requiring extra setup after recovery
  • Boot mode preservation is automatic — nothing to configure
  • Available in every AWS Region where AWS DRS is offered, at no additional cost

If you run Linux systems that depend on UEFI boot and use AWS Elastic Disaster Recovery, this is an update worth knowing about.

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