identify esx boot disk

how should i identify the host disk used as boot device?

i don't see such attribute in HostScsiDisk

in esx shell i can do:

vmkfstools -P /bootbank/

vfat-0.04 file system spanning 1 partitions.

File system label (if any):

Mode: private

Capacity 261853184 (63929 file blocks * 4096), 96301056 (23511 blocks) avail, max file size 0

UUID: 3a9855e0-3592e15a-0150-e5f8ae2e48e3

Partitions spanned (on "disks"):

mpx.vmhba32:C0:T0:L0:6

Is Native Snapshot Capable: NO

thanks