How to printf multiline output in place?

I'd like to print multiline output in place if it's posible. I have a simple for loop like this:

for i in {1..100}; do
  OUTP=`df -h |grep sda`
  echo -ne "$OUTP\r"
  sleep 5
done

I would like to get output:

/dev/sda2       110G  9.0G   96G   9% /mnt/sdb
/dev/sda1      1022M  248M  775M  25% /mnt/sdb/boot/efi

and to be replaced with new sizes, as I'm syncing files. but instead I'm getting:

/dev/sda2       110G   19G   87G  18% /mnt/sdb
/dev/sda2       110G   19G   86G  18% /mnt/sdb/boot/efi
/dev/sda2       110G   19G   86G  18% /mnt/sdb/boot/efi
/dev/sda2       110G   19G   86G  19% /mnt/sdb/boot/efi
/dev/sda2       110G   20G   85G  19% /mnt/sdb/boot/efi

It is jumping back only one line and replacing previous line, and keeps adding one line when there is only output of two lines. When output 3 lines it would add extra 2 lines like following:

/dev/sda2       110G   49G   56G  47% /mnt/sdb
/dev/sda1      1022M  248M  775M  25% /mnt/sdb/boot/efi
/dev/sda3       299G  949M  283G   1% /mnt/sdb/var
/dev/sda2       110G   49G   56G  47% /mnt/sdb
/dev/sda1      1022M  248M  775M  25% /mnt/sdb/boot/efi
/dev/sda3       299G  1.5G  282G   1% /mnt/sdb/var
/dev/sda2       110G   49G   56G  47% /mnt/sdb
/dev/sda1      1022M  248M  775M  25% /mnt/sdb/boot/efi
/dev/sda3       299G  1.9G  282G   1% /mnt/sdb/var
/dev/sda2       110G   49G   56G  47% /mnt/sdb
/dev/sda1      1022M  248M  775M  25% /mnt/sdb/boot/efi
/dev/sda3       299G  2.4G  281G   1% /mnt/sdb/var

And so on.
I tried \r\r but no luck. Any suggestions?

Solution

There are different terminal command sequences for that sort of thing. You might be able to save the cursor position and restore it with:

$ tput sc; printf 'multi\nline\noutput\n'; tput rc; printf '%s' 'overwrite line 1'; echo; echo; echo
overwrite line 1
line
output

For your case, that becomes:

tput sc     # Save cursor position
for i in {1..100}; do
  outp=$(df -h |grep sda)
  printf '%s' "$outp"
  tput rc   # Restore cursor position
done

Note that it is bad practice to use ALL_CAPS for variable names, and also that the variable here is totally unnecessary (unless you wish to retain the data for use later in the script). You could easily do:

for i ...; do
  tput sc
  df -h | grep sda
  tput rc
done