As you can see from the output,
/dev/disks/naa.600605b00405ee8016d41b360d2a25eap3 10229760 3898433535 1944101888 fb VMFS
is the VMFS datastore. Although it is Partition 3 it's located at the end of the disk/volume as shown in the link I posted before. Other than with the classic ESX (with the Service Console), ESXi does not store any operating system related data on the VMFS datastore/partition.
André