Following an excellent post at Vmetc.com talking about disk alignment where 3 options are given to align VMDKs
- Manually with diskpart or fdisk before adding data.
- NetApp’s ESX Host Utilities – mbrscan and mbralign
- Vizioncore’s vOptimizer Pro
Let me introduce a fourth option here:
- Migrate your template to Windows 2008/Vista or higher
Indeed, by default Windows 2008 will align its boot disk and any other disk to 1,024KB (a 2,048 sectors offset) to accomodate any storage vendor disk offset.