I’m wondering if something is wrong with using diskpart against vhdx files.

I use Powershell to generate Diskpart script, I can’t use the cmdlet optimize-vhd because I don’t have hyper-V, here is an example:

select vdisk file=E:\Profils-RDS\UVHD-S-1-5-21-XXXXXX-XXXX-XXXX-XXXXX.vhdx
attach vdisk readonly
compact vdisk
detach vdisk    

It works as expected: my vhdx files get size reduced.

but in eventlog i get Event warning for each Disk i run my diskpartscript :

<Provider Name="Disk" /> 
<EventID Qualifiers="32772">51</EventID> 
<Level>3</Level> 
<Task>0</Task> 
<Keywords>0x80000000000000</Keywords> 
<TimeCreated SystemTime="2022-05-30T15:40:38.925739000Z" /> 
<EventRecordID>1087363</EventRecordID> 
<Channel>System</Channel>

Does someone reduce vhdx files without Hyper-V, do you have the same behaviour in eventlog ?