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AWS drs: Clarify boot mode and architecture requirements for launch-into-source

Service: drs · 2026-09-27 · Documentation low

File: drs/latest/userguide/default-drs-launch-into-source-instance.md

Summary

Rewrites the boot mode requirement to explain UEFI vs legacy BIOS compatibility and expands the architecture requirement to allow x86_64 or arm64 matching the source server.

Security assessment

The change documents instance compatibility (boot mode, processor architecture, HVM, EBS root) for DRS launch-into-source; it is functional guidance with no security control, credential, or vulnerability content.

Evidence

+  4. The instance to launch into must meet these requirements:

Diff

diff --git a/drs/latest/userguide/default-drs-launch-into-source-instance.md b/drs/latest/userguide/default-drs-launch-into-source-instance.md
index 9ccc1b598..7535d4c7a 100644
--- a//drs/latest/userguide/default-drs-launch-into-source-instance.md
+++ b//drs/latest/userguide/default-drs-launch-into-source-instance.md
@@ -21 +21 @@ This setting is only valid when the replication and recovery are done in-AWS, be
-  3. If the instance to launch into is Linux, it must have the BIOS boot mode, and if this is Windows, it must have the same boot mode as that of the recovery instance the **Start reversed replication** or **Protect recovered instance** was called on. 
+  3. The instance to launch into must support the boot mode of the recovery instance the **Start reversed replication** or **Protect recovered instance** was called on. If the recovery instance uses the UEFI boot mode, the instance to launch into must also use the UEFI boot mode. If the recovery instance uses the legacy BIOS boot mode, the instance to launch into can use either boot mode. This applies to both Linux and Windows. Elastic Disaster Recovery checks the boot mode when it launches into the instance, and the instance to launch into must report its boot mode to Amazon EC2. Instances launched before March 2023 might not report a boot mode. 
@@ -23 +23,7 @@ This setting is only valid when the replication and recovery are done in-AWS, be
-  4. The instance to launch into must have the x86_64 architecture, HVM virtualization and an EBS root device.
+  4. The instance to launch into must meet these requirements:
+
+     * The same processor architecture as the source server: `x86_64` or `arm64`.
+
+     * Hardware virtual machine (HVM) virtualization.
+
+     * An Amazon Elastic Block Store (Amazon EBS) root device.