In this example, you extend the logical file system by allowing it to span to a new partition.

vmkfstools -Z /vmfs/devices/disks/naa.disk_ID_2:1 /vmfs/devices/disks/naa.disk_ID_1:1

The extended file system spans two partitions—naa.disk_ID_1:1 and naa.disk_ID_2:1. In this example, naa.disk_ID_1:1 is the name of the head partition.