I want to build a Windows 10 PC with 500GB SSD and 500GB HDD (and other disks, but they are not important in this question).

How to make that HDD to be a silent copy of the SSD? I mean all data on SSD should be "mirrored" on HDD in "lazy" mode.

I've read about RAIDs, but as I understood that is not exactly what I need, because in RAID SSD write speed will be limited by HDD's one.

So, maybe anybody know the way how to do that? What software I should use? Any suggestions are welcomed.

  • 1
    Are you asking us to recommend some software? That's what we do here, but I don't see it in your question, which is why it has been flagged as off-topic. If you edit it to ask for some software recommendation, then you will likely get an answer.
    – Mawg
    Feb 27, 2019 at 10:24
  • Your question is very interesting and relevant here if you are looking for a software recommendation. As Mawg mentioned, please edit your question so it can be reopened. Thanks! Feb 27, 2019 at 20:43
  • @RockPaperLizard is the edit good enough to un-hold?
    – Mawg
    Feb 28, 2019 at 13:17
  • You could install cygwin on your machine, and install rsync or rdiff-backup on it such that it unidirectionally copies all files (with some exceptions) from the SSD to the HDD whenever a change on the SSD occurs (even immediate file deletions can be made possible). I've never done such a setup though. I've also never usd the Windows port of these programs.
    – knb
    Feb 28, 2019 at 14:24
  • You tagged the question as backup. Are you aware that a copy as you describe will not be a backup? For the same reason RAID is not a backup. Maybe you could describe why you want such a non-RAID but similar to RAID solution. Feb 28, 2019 at 19:14

1 Answer 1


It seems that Active disk cloning feature of Acronis True Image 2019 may do what you want. Another term they use is "Non-Stop Backup", which probably relates to an older version of their software.

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