Update faq.yml

Added an FAQ in regards to storage vMotion with Azure NetApp Files.

Author: riperez123

articles/azure-vmware/faq.yml

@@ -4,7 +4,7 @@ metadata:
   description: "Get answers to common questions about Azure VMware Solution."
   ms.topic: faq
   ms.service: azure-vmware
-  ms.date:  1/16/2025
+  ms.date:  1/24/2025
 title: Common questions about Azure VMware Solution
 summary: This article answers commonly asked questions about Azure VMware Solution.
 
@@ -271,6 +271,9 @@ sections:
       - question: What is the RAID configuration of the disk groups?
         answer: The disk groups aren't RAID configured. Instead, they're just a bunch of disks (JBOD) and are [directly controlled by vSAN](https://core.vmware.com/vsan-learn-and-evaluate).
 
+      - question: Why does a storage vMotion take an extended period of time from Azure NetApp Files to another datastore? 
+        answer: When performing a storage vMotion from an external file based datastore such as Azure Netapp Files to another datastore the task may run for an extended period of time.  This is due to the use of the Software Datamover in the ESXi kernel.  This datamover requires that all the blocks in the vmdk being read and transferred to the ESXi host regardless of content.  This causes the entire size of the vmdk to be transferred from the external array through the ESXi host in and then to the destination datastore.  The entire disk must be read in order to create a complete replica at the destination.  The destination format and consumed space depends on the destination datastore capabilities, protocol and format. Since all blocks must be read from the source datastore the time to complete this operation may be longer than expected.
+
 
   - name: Hosts, clusters, and private clouds
     questions: