Add a partition to a Virtual Machine not showing up until reboot

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MABelleville_JW

New Member
Jul 24, 2025
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Good Day all

Is there a way to add an additional partition for a vm on the fly?
It appears I need to reboot the Windows VM for it to pickup the partition(drive space).
 
Hi @MABelleville_JW , welcome to the forum.

"Partition" terminology is usually used for a portion of a disk. It sounds like you are adding an additional Virtual Disk (disk image).
Based on your description that a reboot is required, it likely means that you are adding an IDE disk. IDE is simply not hot-pluggable.
You can switch to SCSI controller and then you will not have to power off/on the VM.

Cheers

Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox
 
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bbgeek17 said:
Hi @MABelleville_JW , welcome to the forum.

"Partition" terminology is usually used for a portion of a disk. It sounds like you are adding an additional Virtual Disk (disk image).
Based on your description that a reboot is required, it likely means that you are adding an IDE disk. IDE is simply not hot-pluggable.
You can switch to SCSI controller and then you will not have to power off/on the VM.

Cheers

Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox
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I am using a HP server with a controller, the Windows VM itself is set to use a SATA drive
 
The orange indicates that the disk will not be available until VM cold start. I am not finding a documentation reference, however tribal knowledge suggests SATA is not hot-pluggable either.
W

Thread 'HW changes stay orange'

SuperNube here, giving Proxmox a shot given the good reviews but finding it difficult to visualise the virtual infrastructure of the system, hopefully i'll get better at that.

The probelm i'm having is i make changes to the HW of a VM and their in orange, how do i apply the changes (1 is simply remove cd drive) I have rebooted.
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Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox
 
The orange means you need to power off the VM to make the hardware change.

If you use a SCSI disk as suggested the drive will show up but then of course you need to initialize and format it. It should also be a lot faster.

Edit: to boot off SCSI, you need to load the drivers first, or load them during the Windows install.
 
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