Error: There is no more space for virtual disk reported by the Virtual machine
Article ID: 445473
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Products
Issue/Introduction
- Multiple Virtual machine goes down reporting below error message:
There is no more space for virtual disk. You might be able to continue this session by freeing disk space on the relevant volume, and clicking Retry. Click Cancel to terminate this session. - In vCenter UI, Cluster > Monitor > vSAN > Capacity usage for 30 days shows the usage got increased gradually.
- vSAN Skyline health will report 'Disk Capacity' error with multiple disks reporting high usage.
- Below command output shows the multiple disks usage reached up to 100%.
esxcli vsan debug disk overview list
Environment
VMware vSAN
Cause
Virtual machines are reporting space issues as multiple vSAN disk usage reached 100% full due to the large number of snapshot disk for the VMs in vSAN datastore.
When a snapshot is taken, the original virtual disk becomes read-only, and all new writes are redirected to a new snapshot disk which grows continuously as data changes over time.
Hence, over a period of time these large number snapshots can grown and can cause the vSAN datastore to become full.
Review the output of the below command to identify the snapshots disks and its usage in the vSAN datastore.esxcli vsan debug object list
Resolution
- Create free space on vSAN datastore by following any of the below steps.
Add Capacity to the datastore by adding more capacity disks or adding additional nodes to the cluster with disk groups.
Clear up space by deleting unused or unnecessary data
- Wait for the resync to move the data from the high usage disks to the hosts.
- Consolidate the Virtual machine once the vSAN datastore having enough free space available for consolidation.
Ensure that the datastore has at least 1.5x the size of the total snapshot data before attempting consolidation.
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