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Server 2012 R2 - Error Extending Volume: Size Not Supported

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#1 Razoe


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Posted 09 August 2015 - 10:27 PM

Hey Guys, so i got a file server, running Server 2012 R2.


Its a Virtual Machine, created using Hyper V,


for some reason the C drive size was only 9GB or so, and then there is a DATA drive thats about 1TB large(R:).


The C drive is almost full, so i cant install anything..... i shrinked the Data drive by about 50 gigs, and planned to give it to the C drive, but when i try to extend it using server manager > file and storage services > volumes


i get the error " Error Extending Volume: Size Not Supported".

see attached image for screenshot,



also a side note, i cant delete the R partition either, i get the following error " Error deleting volume: the operation is not allowed on a system or critical partition"




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#2 Wand3r3r


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Posted 10 August 2015 - 11:53 AM



"by extending them into adjacent unallocated space on the same disk"

failed due to no unallocated space.


You also have the issue of doing this from a virtual.  I suspect R: is where the virtual is running from.  This desired operation is like doing leg surgery on a runner running a race.

#3 sflatechguy


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Posted 23 August 2015 - 01:31 PM

You will most likely have to shut down the VM and then increase the size of the C: drive -- not sure you can do that on the fly while the VM is running in Hyper-V. Reboot the VM and then reallocate the new space.

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