Error creating large VHDX on NAS from Server 2012

Question

I used Mklink to create a symbolic link to an SMB share on a NAS. Using Disk Management I am creating a VHD.

I have a 100TB NAS. I created an SMB share on the NAS. I have a video server, with a symbolic link to the share location. I am creating a 31TB VHDX. I select Create VHD. Select VHDX, the size and TB from the drop down. I select fixed size. Then browse to select the location. When I click OK, the error dialog comes up saying there is not enough space. My NAS is over 100TB. And the VHDX option says it supports up to 64TB. Why am I getting errors when creating a 31TB drive. I have tested using a 1TB fixed VHDX, and it works as intended.

I am creating this on Server 2012R2, but testing with the 1TB drive works on both Windows 10 and Server 2012.

Ultimate goal is to create a local disk on the server for a long term storage location for video. This works great for the 1TB size drive.

Answer 1

ello

Thank you for your question and reaching out.
I can understand you are having some issues while creating 31 TB vhdx on NAS

1. Please try to create new vhdx using powershell as below

New-VHD -Path C:\fixed.vhd -Fixed SizeBytes 31TB

2. If you still faces the same error then try to create Dynamic disk with 31 TB and convert it to Fixed Disk.
3. Please ensure on your NAS box there should Adjutants 31 TB space available.

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Answer 2

I tested using a 1TB, 3TB and 10TB. It worked once but was not able to create the single large 31TB drive or multiple smaller ones. I eventually created a dynamic drive and that seemed to work.

Answer 3

I The dynamic VHDX worked fine for a few weeks, then all of a sudden it disappeared. It did not show up in Disk Management, even after a rescan. I went to the location of the Symbolic Link file and clicked on it. Once I did this, it was visible in Disk Management. It has now disappeared three times in one day.