nfstest.sh

#!/bin/bash
  
## run as root
## NFS is your NFS mount

NFS=/scratch

if ! mountpoint -q "$NFS"; then
  echo "$NFS should be a mounted NFS partition"
  exit 1
fi

for i in 1 2 3 4; do
  IMG="$NFS/image.$i"
  MP="$NFS/mp"

  truncate -s 8G "$IMG"
  mkfs.ext4 -F "$IMG" &>/dev/null
  [[ -d "$MP" ]] || mkdir "$MP"

  mount -o loop "$IMG" "$MP"

  # write out 4G of random data to the mounted image
  echo "Writting round $i"
  #dd if=/dev/urandom of="$MP/rnd.$i" bs=4M count=1000 status=progress
  dd if=/dev/zero of="$MP/rnd.$i" bs=4M count=1000 status=progress
  ls -l "$MP"
  echo "Round $i done"

  umount "$MP"
  rmdir "$MP"
  rm -f "$IMG"
done