VMware shrink an RDM and associated windows partition

Posted on 2014-08-28
Last Modified: 2014-09-02

I shrunk an RDM to 2TB so I can put it in virtual mode to prepare for an RDM to VMFS migration via sMotion. The only part that worries me is that even after removing the RDM from windows, deleting from disk and reattaching, the old 5TB size still exists.

How would I make the windows NTFS format recognize the new smaller size?

Thanks for reading
Question by:snyderkv
    LVL 116

    Expert Comment

    by:Andrew Hancock (VMware vExpert / EE MVE)
    You need to shrink the OS Partition first!

    Unless you have Snap manager for NetApp

    Author Comment

    How would I shrink the OS partition? I think that's what I'm asking. The RDM is already resized.

    We have all the snapmanager licensese but I don't see anything called snap manager for netapp
    LVL 116

    Assisted Solution

    by:Andrew Hancock (VMware vExpert / EE MVE)
    Well Snapmanager installed in the OS!

    You should shrink the OS partition first, either by using DIsk Management in the OS, or using a third party utility.

    some third part apps, are listed in my EE Article

    HOW TO:  Resize a VMware (VMDK) Virtual Disk

    and once the Partition OS is shrunk, and re-sized, then shrink the RDM!

    Accepted Solution

    Wow all I did was just "shrink" the volume in computer management. Once it was shunk, I simply extended the volume with a right click and windows automatically reduced the size to reflect the NetApp RDM. All the data is there. No crazy tools involved.

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