Why we cannot modify disk if we have VM snapshot?
This is most likely due to the metadata in the snapshot file(s) which cannot be reconfigured that easily, and resizing the base disk would require to reconfigure the snapshot files too. Snapshot files contain changed data blocks with a reference/pointer to the location in the base virtual disk, see VMware KB: Understanding virtual machine snapshots in VMware ESXi and ESX
André
Hi
Yes AP is right , if need to do then first need to merge snapshot .
If i am not wrong, when the VM is running on the snapshot, the base disk will be mounted in persistent Read-Only Mode and would not allow for any modify operations.
