On your host, the hardware acceleration for block storage devices is enabled by default. You can use the vSphere Web Client advanced settings to disable the hardware acceleration operations.
As with any advanced settings, before you disable the hardware acceleration, consult with the VMware support team.
- Browse to the host in the vSphere Web Client navigator.
- Click the Manage tab, and click Settings.
- Under System, click Advanced System Settings.
- Change the value for any of the options to 0 (disabled):