## initramfs.conf (client)
$ grep -v ^$ /etc/initramfs-tools/initramfs.conf | grep -v ^#
MODULES=netboot
BUSYBOX=y
COMPCACHE_SIZE=""
BOOT=nfs
DEVICE=eth0
NFSROOT=auto

## fstab (client)
$ grep /dev/nfs /etc/fstab
/dev/nfs / nfs soft,intr,rsize=8192,wsize=8192,async,nfsvers=3,rw 1 0

## pxelinux setup (server)
$ cat pxelinux.cfg/01-00-1a-4d-5d-c8-70
LABEL linux
KERNEL media-box.vmlinuz
APPEND root=/dev/nfs nfsroot=192.168.0.1:/storage/chroots/media-root nfsopts=soft,intr,rsize=8192,wsize=8192,async,nfsvers=3,rw ip=dhcp initrd=media-box.initrd

## exports (server), but this is correct, see next section.
$ grep -v ^# /etc/exports
/storage/chroots/media-root 192.168.0.17(rw,async,no_root_squash,no_subtree_check)

## manual mount of fs (client)
$ mount -t tmpfs none /tmp; mkdir /tmp/foo; sudo mount -no soft,intr,rsize=8192,wsize=8192,async,nfsvers=3,rw -t nfs 192.168.0.1:/storage/chroots/media-root /tmp/foo
$ sudo touch /tmp/foo/a
$

## /proc/mounts (client)
$ cat /proc/mounts
rootfs / rootfs rw 0 0
none /sys sysfs rw,nosuid,nodev,noexec 0 0
none /proc proc rw,nosuid,nodev,noexec 0 0
udev /dev tmpfs rw,mode=755 0 0
fusectl /sys/fs/fuse/connections fusectl rw 0 0
192.168.0.1:/storage/chroots/media-root / nfs ro,vers=3,rsize=131072,wsize=131072,namlen=255,hard,nointr,nolock,proto=tcp,timeo=7,retrans=10,sec=sys,addr=192.168.0.1 0 0
192.168.0.1:/storage/chroots/media-root /dev/.static/dev nfs ro,vers=3,rsize=131072,wsize=131072,namlen=255,hard,nointr,nolock,proto=tcp,timeo=7,retrans=10,sec=sys,addr=192.168.0.1 0 0
tmpfs /lib/init/rw tmpfs rw,nosuid,mode=755 0 0
varrun /var/run tmpfs rw,nosuid,mode=755 0 0
varlock /var/lock tmpfs rw,nosuid,nodev,noexec 0 0
tmpfs /lib/modules/2.6.27-7-generic/volatile tmpfs rw,mode=755 0 0
tmpfs /dev/shm tmpfs rw,nosuid,nodev 0 0
devpts /dev/pts devpts rw,nosuid,noexec,gid=5,mode=620 0 0
securityfs /sys/kernel/security securityfs rw 0 0
none /tmp tmpfs rw 0 0
192.168.0.1:/storage/chroots/media-root /tmp/foo nfs rw,vers=3,rsize=8192,wsize=8192,namlen=255,soft,nointr,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.0.1,mountvers=3,mountproto=tcp,addr=192.168.0.1 0 0