Exam AZ-104 topic 1 question 17 discussion

Wrong. You can simply detach a data disk from one VM and attach it to the other VM without stopping either of the VMs.

Stop the VM first so that disk data is not corrupted (if an service is writing data while you detach)

To ensure the virtual machines are offline for the least amount of time possible, the first action you should take is to stop the VM that includes the data disk (Option A). This step is necessary to safely detach the data disk without risking data corruption1.

Answer is A since the strategy allows for the virtual machines to be offline for the least amount of time possible

Just tested this in my lab. C is the correct answer: you will need to detach the disk before you can add it to another vm

it´s C

I made a experiment: 2 VM`s in one region in 2 zones (zone 1 and zone 2). And i can say thats you dont need to turn off virtual machine at all! Create a disk in 1 VM, attach. Now you can see that you can attach Disk on VM when its on. Deattach and you gonna see that`s you dont need to turn off VM to do it. Make snapshot of disk, after that do a new disk that gonna take data from snapshot and make it in 2 zone (or in zone 1 if you deattach from VM in zone 2). After creating go to VM2 disk and attach a new disk. You can do it without turning off VM2. And thats a miracle! Disk2 has been attached! So answer C is complitely correct. If you don`t trust my try it by yourself and you will see

answer is 'C' : When you no longer need a data disk that's attached to a virtual machine, you can easily detach it. This removes the disk from the virtual machine, but doesn't remove it from storage.

I dont like this question. It is possible to hot swap the disk, but it is not a best practice. Best answer is still C

if its not the Primary disk you should be able to detach the disk without stopping the VM - Voting C

This exact question is on the Microsoft practice assessment for the AZ-104 exam and it states to detach the disk

according to this official Microsoft Link: The answer is most probably C You can hot remove a data disk, but make sure nothing is actively using the disk before detaching it from the VM. In the left menu, select Virtual Machines. Select the virtual machine that has the data disk you want to detach. Under Settings, select Disks. In the Disks pane, to the far right of the data disk that you would like to detach, select the detach button to detach. Select Save on the top of the page to save your changes. The disk stays in storage but is no longer attached to a virtual machine. The disk isn't deleted.

See the MS documentation, C is correct.

n Azure, every virtual machine (VM) has at least two types of disks: an operating system (OS) disk and one or more data disks. The OS disk is essential for booting the VM, while data disks are used for applications and data storage. When the question refers to a VM with a “single data disk,” it implies that there is one data disk in addition to the OS disk. Therefore, detaching the single data disk does not affect the VM’s ability to run because the OS disk remains attached, allowing the VM to operate normally. The data disk can be detached while the VM is running

Answer is A since you need to make sure writing is not progress to data disk https://learn.microsoft.com/en-us/azure/virtual-machines/windows/detach-disk

As the questions says which of the following is the action you should take first, so the correct answer is A, because before detaching we have to stop the source VM.

Correct Answer : A. Stop the VM that includes the data disk. As stated in the question, this is the only disk the VM has, meaning it is the one include the OS. no meaning keeping the VM on when detaching the OS disk from it.