/usr/bin/xfs_estimate: invalid option -- '-'
Usage: xfs_estimate [opts] directory [directory ...]
	-b blocksize (fundamental filesystem blocksize)
	-i logsize (internal log size)
	-e logsize (external log size)
	-v prints more verbose messages
	-V prints version and exits
	-h prints this usage message

Note:	blocksize may have 'k' appended to indicate x1024
	logsize may also have 'm' appended to indicate (1024 x 1024)