Storage Spaces pool physical disk resize not reflected after Azure managed disk expansion

Hi,

From your description it sounds like you expanded the size of one of the managed disks instead of using Configure drive capability under Storage -- Management tab on the SQL virtual machine resource for your VM. For reference, below screenshot highlights button for expanding Data drive (I understand you are trying to expand Log):

Please confirm the technique you used.

If you did not use the screen as shown above you will need to manually add new managed disk (e.g. P15) to VM in Azure portal. Next inside of VM use Server Manager -- File and Storage Services to add the new physical disk to the existing Storage Pool you want to increase, then once that's finished right-click on the existing virtual disk and choose Extend Virtual Disk. Finally open Disk Management, right-click on the SQLVMLOG (G:) volume and choose Extend Volume. You can do this without restarting the VM.

As always before making any significant changes to VM I recommend you make sure you have good backup and take snapshots of existing disks.

Please click Accept Answer and upvote if the above was helpful.

Thanks.

-TP