Can't add Mirror for 2 x 1.5TB single partition drives


  1. r11pag
    Posts : 4
    Windows 7 Professional
       New #1

    Can't add Mirror for 2 x 1.5TB single partition drives


    HI,

    I have 2 1.5TB eSATA USB2 external drives. I want to set them up as a mirror.
    My first drive is formatted NTFS with all my data - the second is brand new - no partition.

    I select the first drive and select Add Mirror and select disk 2 my new drive.
    I get the warning that the drive will be converted to a dynamic drive.... I select OK.
    I then get the following error-
    "this operation is not supported by the object"

    Any ideas???
    Thanks
    Howard
      My Computer
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  3. zigzag3143
    Posts : 28,845
    Win 8 Release candidate 8400
       New #2

    r11pag said:
    HI,

    I have 2 1.5TB eSATA USB2 external drives. I want to set them up as a mirror.
    My first drive is formatted NTFS with all my data - the second is brand new - no partition.

    I select the first drive and select Add Mirror and select disk 2 my new drive.
    I get the warning that the drive will be converted to a dynamic drive.... I select OK.
    I then get the following error-
    "this operation is not supported by the object"

    Any ideas???
    Thanks
    Howard

    Yoou may just need to set up a dynamic partition from the free space


    Ken
      My Computer
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  4. r11pag
    Posts : 4
    Windows 7 Professional
    Thread Starter
       New #3

    Retried using free space - Still fails with same error


    Hi Ken,

    Many thanks for the reply. I shrank the volume and tried creating a new mirror using the free space. The wizard goes through fine - gives me the summary and when I click OK to proceed it fails with the same error. Interestingly when I try and repeat the process the drive letter I chose last time is unavailable for selection??

    So I tried converting my existing disk to dynamic first - and the convert to dynamic fails with the same error!! So it appears its the initial conversion that is generating the error......

    H
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  6. Dwarf
    Posts : 9,582
    Windows 8.1 Pro RTM x64
       New #4

    Are they separate units plugged into different USB ports?
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  7. r11pag
    Posts : 4
    Windows 7 Professional
    Thread Starter
       New #5

    Yes - the drives only have the one USB connection each so they are plugged into separate ports on the back of my Dell Optiplex 745
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  8. Dwarf
    Posts : 9,582
    Windows 8.1 Pro RTM x64
       New #6

    I think that is your answer. Whilst it is perfectly possible to have a RAID array on internal disks, either connected to the motherboard or an add-on card, it is not possible to have such an array if connected externally via separate USB ports. You can via separate eSATA ports, since they are basically the same as the on-board ports except external. You can have an external USB RAID, however the disks need to be in a single enclosure which can utilise RAID, i.e. has hardware support, and which only requires a single USB port.
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  10. r11pag
    Posts : 4
    Windows 7 Professional
    Thread Starter
       New #7

    Hey, many thanks for that. The two drives both have eSATA ports but my server only has USB.

    Looks like it's back to manual copies again 8-(

    Thanks for all your help guys!
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  11. thehatt
    Posts : 1
    Windows 7
       New #8

    I had the exact same problem, same error message and everything - but mine is from one USB port.. I have two drives sitting in a docking station. I want to mirror them, but I keep getting this same error message. So, my problem is not because of connecting them from two USB ports... thoughts?
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