cloning to smaller hard disk

i want to clone bigger HDD(sd1) to smaller HDD(sd0) 

1) boot pc by USB stick ( indtall53.fs)

2)chose install

3) acertain disks by !
4) exit

5) which disk is the root dik ? ---> sd0 

then formatting sd0

6)which disk do you want to initialize? --->sd1
   then
   controll + c 

7)mkdir -p /m1
   mkdir -p /m2
   mount /dev/sd1a /m1
   mount /dev/sd0a /m0

8) (cd m1 ; tar cvpf - .)|( cd /m0 ; tar xpf -) 

10) halt -p 
11) remove bigger HDD (namely smaller HDD only inserted)
12 ) reboot and then choose upgrade

13)mkdir /m0
     mount /dev/sd0a /m0

14) echo '/dev/sd0a / ffs rw,wxallowed 1 1' > /m0/etc/fstab

 at present namely , 10 days later

i think that

 In advance the fstab of the bigger hard disk

should be  /dev/sd0a / ffs rw,wxallowed 1 1  
this setting is more convinient 

15) then do upgrade again

all is done


but
this method require 2 times of USB memory booting .

so i write down only 1 time USB memory booting method on
https://qiita.com/tyokai/items/2aaac13642599b09dd68 

but 
both methods may change kernel by upgrade ,
in thi point growfs is superior . 
so they are  most usable at virsion grade up .