When you create a VMFS5 datastore on a device that supports atomic test and set (ATS) locking, the datastore is set to the ATS-only mode. In certain circumstances, you might need to turn off the ATS mode setting.
- ♦ To turn off the ATS setting, run the following command:
vmkfstools --configATSOnly 0 device
The device parameter is the path to the head extent device on which VMFS5 was deployed. Use the following format:
/vmfs/devices/disks/disk_ID:PNote: It is sufficient to run this command on one of the ESXi hosts sharing the VMFS5 datastore. Other hosts automatically recognize the change.