Nathan；

擴大虛擬機磁碟時，發現無法修改該欄位。
下方 Maximum 顯示 N/A (正常應該顯示剩餘的空間大小)。

查看相關文章後，如果虛擬主機執行Snapshot時，則無法擴大硬碟，移除後則恢復正常。

https://communities.vmware.com/thread/417849

Welcome to the Community,

 
according to the virtual disk file name in the first screen shot, the VM is running on an active snapshot. The snapshot manager may not always display all snapshots, so take a look at the VM's datastore to see whether there are ...-00000x.vmdk (snapshot) files.

To get rid of the snapshots, create a new snapshot and run "Delete All" from the snapshot manager to commit all snapshots to the base disk.

 
André