Hello, 

When migrating a VM (or a container) from one node to another, I miscalculated 
the remaining empty space on my target node, and ended up with a completely 
full disk, which is obviously not something you want. 

Proxmox already issue warnings like "large storage, migrating may take a 
while", and it can also issue blocking errors, like "local CD attached to VM". 
Adding a check of [current VM size] vs [remaining space on target dataset] 
would be helpful, and a good way to avoid shooting yourself in the foot (which 
proxmox usually does pretty well). There could be a warning when the target 
dataset will be almost entirely filled (>97% usage), and an error when the 
target dataset isn't big enough to migrate the VM. 

I'm sorry if this is not the correct place to report this, but I didn't see any 
"feature request" subforum on the proxmox forum.

Regards, 

Guillaume Vandenhove



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