Which Windows and Linux OSs support no-rescan upon reboot? - AWS Elastic Disaster Recovery

Which Windows and Linux OSs support no-rescan upon reboot?

A shutdown (from the OS menu or CLI) of any supported Linux or Windows source server no longer causes a rescan in DRS once the source server is restarted. A rescan means that the agent on the source server rereads all blocks on all replicated disks and transmits blocks that are different from the previously replicated data. A rescan is similar to the initial sync but is faster because only blocks that are different need to be transmitted.

Rescans can still happen following a hard reboot, crashes, or when you add or remove disks to or from the source server. In addition, a rescan will occur if the underline Storage types do not use static DUIDs (such as 3PARdata). Supported OSs include:

Windows Server

  • 2012r1

  • 2012r2

  • 2016

  • 2019

  • 2022

Linux

  • CentOS 6–8

  • Oracle 6–8

  • RHEL 6–9

  • Rocky 8 and 9

  • SLES 12 and 15

  • Debian 9–11

  • Ubuntu 16, 18, 20, and 22

  • Amazon Linux 2

Note

For Linux, no-rescan on reboot is supported only on environments that use initramfs.

Important

A rescan duration may impact your RPO

  • While a rescan is conducted, point of time recovery cannot be made.

  • If a disaster occurs during the rescan, you will only be able to restore point of time from before the rescan began. This could affect your ability to meet your RPO.