> Hi All,
>
> I've just solved a problem that had been affecting my evaluation
> of Windows 2008 Hyper-V.
>
> Basically, any VHD operation (Inspect, Create etc), on certain
> clustered SAN disks would fail - windows would be fine, and I could
> copy/create/delete, but attempting to create a vhd, or import from VS
> 2005 would fail with a cryptic 'The parameter is incorrect error'.
>
> The solution is to ensure the LUNS are created with a blocksize
> of 512bytes - some of mine had been created with a blocksize of 4096
> bytes - NTFS & clustering were working fine, but NO VHD operations
> would succeed.
>
> I am talking about the Hardware level LUN definition here, NOT an
> NTFS format size.
>
> Hope this helps another systems admin - MS should really either
> support 4096 bytes as a blocksize in both NTFS and HYPER-V or at least
> give a decent error message.
>
> Regards,
> Graham White