DESIGN: 
 instantiate_from_path(pathname): returns a list of 
	[system_id, scsi serial number]


===============================================================================
FLOW

I   Get mount point of path (filesystem root) i.e. /mnt

II  [filesystems module]
    Get the device filename that was mounted i.e. /dev/vx/dsk/myvol

III [volume_manager module]
    Get the physical SCSI disk devices i.e. /dev/sdb1, /dev/sdc2
    (by querying the relevant volume manager)
    EXAMPLES:
    Veritas: using vx tools
    AIX VM: using odmget
    Linux LVM: using lvm tools
    Solaris LVM: using meta tools
    HP-UX LVM: using lvm tools
    Windows: WMI queries

IV  [scsy module]
    GET SCSI ID by sending a scsi inquiry to the previously found devices

V   [XivScsiId module]
    Translate SCSI ID to the XIV datatype: Nextra Machine ID, LUN ID, etc.
