Disk group comes offline unexpectedly.
vxio: cluster or private disk group %2 has lost access to a majority of its disks. Its reservation thread has been stopped
This message indicates that the host lost access to majority of the disks in a disk group. As a result, vxio will release the SCSI reservations from the remaining disks in the disk group.
Review the Windows Event Viewer for any hard disk failure or connectivity events.
Further information about troubleshooting messages that are reported by vxio can be found in the technote that is linked in the "Related Documents" section.