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dalbright's avatar
dalbright
Aspirant
Jun 10, 2017
Solved

First expansion, not the space I expected

Been with this ReadyNAS fro about 4 years, first time posting...

I performed my first Xraid expansion yesterday, swapping a 2TB drive with a 4TB drive, however, my expanded RAID is not fully utilizing the new drive. Details below:

Prior to expansion, my ReadyNas Ultra 4 plus config was:
Drive 1: WD RED 2TB - 1863 GB - 1858GB Allocated
Drive 2: WD RED 2TB - 1863 GB - 1858GB Allocated
Drive 3: WD RED 3TB - 2794 GB - 2790GB Allocated
Drive 4: WD RED 3TB - 2794 GB - 2790GB Allocated


Yesterday, i replaced Drive 1 with a 4TB WD RED drive and the device executed the restriping and expansion, but drive one is maxed out at 2790 GB allocated (despite drive size of 3726 GB). It now looks like:

Drive 1: WD RED 4TB - 3726 GB - 2790GB Allocated
Drive 2: WD RED 2TB - 1863 GB - 1858GB Allocated
Drive 3: WD RED 3TB - 2794 GB - 2790GB Allocated
Drive 4: WD RED 3TB - 2794 GB - 2790GB Allocated

Does anyone have any inisght into why the 4GB drive is being treated identically to a 3GB drive?

Firmware vs is up to date, RAIDiator 4.2.31.

Thanks!

  • You'll need to replace another disk with a 4TB one to get further vertical expansion.

     

    Note that expansion is limited to 8TB over the life of the volume and you cannot expand past 16TB.

6 Replies

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  • mdgm-ntgr's avatar
    mdgm-ntgr
    NETGEAR Employee Retired

    You'll need to replace another disk with a 4TB one to get further vertical expansion.

     

    Note that expansion is limited to 8TB over the life of the volume and you cannot expand past 16TB.

    • StephenB's avatar
      StephenB
      Guru - Experienced User

      mdgm wrote:

      You'll need to replace another disk with a 4TB one to get further vertical expansion.

       


      Correct. The capacity rule for single redundancy is pretty simple - sum the disks and subtract the largest.  

       

      In addition to the two volume size constraints mdgm-ntgr mentioned, the new disks need to be at least as large as the largest already installed.

      • dalbright's avatar
        dalbright
        Aspirant

        Ok, thanks everyone.  I have another 4fb standing by, but didn't want to add it if the space was going to be wasted.  Appreciate the feedback!

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