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Forum Discussion

MartinEb's avatar
Jan 28, 2021
Solved

Reuse of old ReadyNAS formatted disks

I recently upraded my disks from 4 TB to 8 TB models to have more space on the drive.

When I try to use the old 4 TB drives as normal external USB drives, I see only 1.8 TB of disk size.
Where are the other 2.2 TB? And how can I access to all of the 4 TB data?
The disks are WD Red drives.
Thanks for any idea.

  • Martin,

     

    Erase the partitions of these HDDs on a "generic" Linux system (careful, use the correct physical device name!), like...

     

    dd if=/dev/zero of=/dev/sdz bs=512 count=1

     

    ...or use the Windows disk manager to drop any existing partitions.

     

    If this does not mitigate, it's well possible you use compareably old USB enclosures which are limited to 2 TB storage block devices only.

     

    -Kurt

3 Replies

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  • Martin,

     

    Erase the partitions of these HDDs on a "generic" Linux system (careful, use the correct physical device name!), like...

     

    dd if=/dev/zero of=/dev/sdz bs=512 count=1

     

    ...or use the Windows disk manager to drop any existing partitions.

     

    If this does not mitigate, it's well possible you use compareably old USB enclosures which are limited to 2 TB storage block devices only.

     

    -Kurt

    • Sandshark's avatar
      Sandshark
      Sensei

      My guess is an enclosure limited to 2TB drives.  A Windows machine normally doesn't see a NAS formatted drive at all except in Disk Manager.  If it does show as 1.8TB in Disk Manager, then the issue is the enclosure.

      • MartinEb's avatar
        MartinEb
        Guide

        Thanks for the tip!
        I thing that my enclosure is outdated. I try to organise an new enclosure, that supports more than just 2 GB drives.

         

        regards

        Martin

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