# Managed disk attached to a stopped VM | Cloud Efficiency Hub Canonical: https://www.pointfive.co/efficiency-hub/inefficiencies/managed-disk-attached-to-a-stopped-vm Disks attached to VMs that have been stopped for an extended period, particularly when showing no read or write activity, may indicate abandoned... By: PointFive Updated: 2026-09-28 [Cloud Efficiency Hub](https://www.pointfive.co/efficiency-hub) # Managed Disk Attached to a Stopped VM The short version Disks attached to VMs that have been stopped for an extended period, particularly when showing no read or write activity, may indicate abandoned infrastructure or obsolete resources. PointFive Research Cloud cost research at PointFive Azure service [Azure Managed Disks](https://www.pointfive.co/efficiency-hub/cloud-services/azure-managed-disks) Category [Storage](https://www.pointfive.co/efficiency-hub/service-category/storage) Reference CER-0074 Type Idle or Unused Resource ## Explanation Why the waste happens and who it affects. Retaining these disks without validation leads to unnecessary monthly storage costs. Reviewing and cleaning up inactive disks helps optimize spend and maintain storage hygiene. ## Billing model The pricing dimensions that drive this cost. Managed Disks are billed per provisioned GB per month, regardless of whether the associated virtual machine is running. Disks remain billable whether the VM is Stopped (allocated) or Stopped (deallocated), resulting in ongoing storage charges for unused capacity. A VM that is Stopped but still allocated, for example after a shutdown from inside the guest OS, also continues to incur compute charges; only a deallocated VM stops compute billing. ## How to detect 5 checks to find it in your estate. - Identify Managed Disks attached to virtual machines that have remained in a stopped state over a representative time window - Analyze disk activity metrics to detect absence of read/write operations during the lookback period - Review VM metadata, ownership tags, and decommissioning records to assess whether the disk is still required - Check compliance and backup retention requirements before initiating deletion activities - Validate findings with infrastructure owners or application teams to avoid accidental loss of necessary data ## How to fix How to remove the waste. Deallocate or delete VMs that are still in the Stopped (allocated) state, and delete Managed Disks confirmed to be redundant or obsolete to eliminate unnecessary storage charges. Where long-term retention is required, create a snapshot of the disk or export its contents to a lower-cost storage option before deletion. Incorporate disk ownership tracking and regular audits into operational practices to minimize future accumulation of unused resources. ## Documentation Vendor references for pricing and configuration. - [Azure Managed Disks Overview learn.microsoft.com](https://learn.microsoft.com/en-us/azure/virtual-machines/disks-types) - [Azure Managed Disks Pricing azure.microsoft.com](https://azure.microsoft.com/en-us/pricing/details/managed-disks/) - [States and billing status - Azure Virtual Machines learn.microsoft.com](https://learn.microsoft.com/en-us/azure/virtual-machines/states-billing) ## Related inefficiencies [Browse the library](https://www.pointfive.co/efficiency-hub) - Azure Managed Disks CER-0073 ### [Managed Disk Attached to a Deallocated VM](https://www.pointfive.co/efficiency-hub/inefficiencies/managed-disk-attached-to-a-deallocated-vm) A VM is deallocated but its attached managed disks are still active and incurring storage charges. While compute billing stops for deallocated VMs, the disks remain provisioned and billable. These disks often persist unintentionally after... Storage - Azure Managed Disks CER-0039 ### [Inactive and Detached Managed Disk](https://www.pointfive.co/efficiency-hub/inefficiencies/inactive-and-detached-managed-disk) Managed Disks frequently remain detached after Azure virtual machines are deleted, reimaged, or reconfigured. Some may be intentionally retained for reattachment, backup, or migration purposes, but many persist unintentionally due to the... Storage - Azure Managed Disks CER-0429 ### [Ultra Disk Compatibility Enabled Without an Attached Ultra Disk](https://www.pointfive.co/efficiency-hub/inefficiencies/ultra-disk-compatibility-enabled-without-an-attached-ultra-disk) To attach an Ultra Disk, a VM must first have Ultra Disk compatibility enabled, which allocates dedicated bandwidth between the VM and the block storage scale unit. Azure charges a reservation fee for this capability whenever it is enabled... Storage --- Source: the public page above. Product screenshots and illustrative interfaces are examples, not live customer data.