1.    09 Nov 2016 #1
    Join Date : Jul 2015
    Posts : 9,633
    Windows 10 Pro

    Migrating from single disk to Raid 1

    Hi all! Setting up my first Raid 1 NAS because I want redundancy for my important files. So here is my proposed plan.

    1. I have a 3 TB drive with about 2 TB data on it - I'll call this the source disk. It has never been in an array, just a normal single disk. I purchase a D-Link DNS325 NAS which supports Raid 1 and has 2 drive bays. I also purchase a new 3 TB hard drive.

    2. Install the new single drive into the NAS and set it up in Raid 1 mode.

    3. Copy all files from source drive to the NAS which has 1 drive in it in Raid 1 mode.

    4. Wipe the source drive and add it to the NAS and the Raid 1 array.

    Does anyone know if that will work, and will the newest hard drive with all the data automatically mirror to the 2nd hard drive when it is added?

    If the answer is NO, then my next question is what happens when 1 hard drive fails in the Raid 1 array and I need to replace it?

      My ComputerSystem Spec
  2.    09 Nov 2016 #2
    Join Date : Mar 2015
    Posts : 1,174
    Windows 10 Pro x64

    The only part I am stuck on is if the source drive would be wiped if you tell it to create an array, and I'm thinking it will. Normally, you can't create an array with just one drive.

    I am not 100% sure, but I think your only option is to copy off the data to another drive(s), and then create your array...then copy it back to the array.

    If one drive fails, you replace it with a new drive...however, the array had already been created, so the NAS would expect a second drive and to rebuild.
      My ComputerSystem Spec
  3.    09 Nov 2016 #3

    You Visit Website i think helpfull website : Convert a single drive system to RAID - ArchWiki
      My ComputerSystem Spec
  4.    09 Nov 2016 #4
    Join Date : Jul 2015
    Posts : 9,633
    Windows 10 Pro
    Thread Starter

    Thanks all. I've got two new hard drives coming for the NAS and will play around with different things for a bit and report back my findings. What I am really trying to avoid is having to copy 2 TB of stuff twice and also trying to avoid having an extra 3 TB hard drive left over at the end.
      My ComputerSystem Spec


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