Update fail-to-mount-azure-disk-volume.md

Added scenario 6 for nodes-exceed-max-volume-count 
https://stackoverflow.com/questions/58880358/kubernetes-azure-nodes-exceed-max-volume-count

Author: abarqawi

support/azure/azure-kubernetes/storage/fail-to-mount-azure-disk-volume.md

@@ -1,7 +1,7 @@
 ---
 title: Unable to mount Azure disk volumes
 description: Describes errors that occur when mounting Azure disk volumes fails, and provides solutions.
-ms.date: 09/06/2024
+ms.date: 03/22/2025
 author: genlin
 ms.author: genli
 ms.reviewer: chiragpa, akscsscic, v-weizhu
@@ -23,6 +23,7 @@ However, the pod stays in the **ContainerCreating** status. When you run the `ku
 - [Volume is already used by pod](#error3)
 - [StorageAccountType UltraSSD_LRS can be used only when additionalCapabilities.ultraSSDEnabled is set](#error4)
 - [ApplyFSGroup failed for vol](#error5)
+- [node(s) exceed max volume count](#error6)
 
 See the following sections for error details, possible causes and solutions.
 
@@ -189,6 +190,21 @@ OnRootMismatch: Only change permissions and ownership if permission and ownershi
 
 For more information, see [Configure volume permission and ownership change policy for Pods](https://kubernetes.io/docs/tasks/configure-pod-container/security-context/#configure-volume-permission-and-ownership-change-policy-for-pods).
 
+## <a id="error6"></a>node(s) exceed max volume count
+Here are details of this error:
+```output
+Events:
+Type   Reason      Age  From        Message
+----   ------      ---- ----        -------
+Warning FailedScheduling 25s  default-scheduler 0/8 nodes are available: 8 node(s) exceed max volume count. preemption: 0/8 nodes are available: 8 No preemption victims found for incoming pod..
+```
+### Cause: Max Disks for VM size is reached 
+The maximum disk limit is reached for the specified VM Size .
+
+### Solution: Use anotehr VM size with more disk limits
+You can delete existing disks for the Node ,or scale the nodepool, or add new nodepool with VM size with more disk limit.
+Also pay attention for the limit of disks per node should not exceed the [limit](https://kubernetes.io/docs/concepts/storage/storage-limits/#kubernetes-default-limits).
+
 ## More information  
 
 For more Azure Disk known issues, see [Azure disk plugin known issues](https://github.com/andyzhangx/demo/blob/master/issues/azuredisk-issues.md).