Here is a copy of my current rc.netboot file -

#!/bin/sh

##

# Copyright 2002-2009 Apple Inc.

#

# This script configures NetBoot

##



. /etc/rc.common



#

# This script has been modified to support diskless or RAM disk netboot

#

# Revised:      July 14th, 2011

# Revised by:   Richard Glaser

#

# For more information or give feedback or file bugs...

# See web site...

#

#    http://www.macos.utah.edu/documentation/administration/setup_netboot_service_on_mac_os_x_10.6.x_client.html

#



# 

# Define: NETBOOT_SHADOW

#

# Purpose:

#   To change the behavior of the system when choosing a netboot shadow

#   to use.

#

# Values:

#   -NETWORK-       Try to use the network for the shadow file, if

#           that fails, use the local drive

#   -NETWORK_ONLY-  Only use the network, fail if not available

#   -LOCAL-     Use the local drive for the shadow file, if that

#           fails, use the network

#   -LOCAL_ONLY-    Only use the local drive for the shadow, fail if

#           not available



NETBOOT_MOUNT=/var/netboot



# Change to "-LOCAL_ONLY-" to use RAM Disk instead of network

NETBOOT_SHADOW=-LOCAL_ONLY-



# NETBOOT_SHADOW=${NETBOOT_SHADOW:-NETWORK-}

# There is a bug in the default variable assignment, it loses the the beginning "-"

# So, it never correctly assigns the variable or branch in the case statement in the 

# do_start() sub-routine and always gets assigned to the "* )" branch.



Failed()

{

    echo rc.netboot: $1

    echo rc.netboot: $1 > /dev/console

    sleep 5

    exit 1

}



common_start()

{

    netboot_dir=$1

    netboot_shadow=$2

    if [ "${netboot_dir}" = "" ] ; then

    Failed "netboot_dir is empty"

    fi

    if [ "${netboot_shadow}" = "" ] ; then

    Failed "netboot_shadow is empty"

    fi

    netboot_shadow="${netboot_dir}/${netboot_shadow}"

    if ! mkdir -p "${netboot_dir}" ; then

    Failed "create ${netboot_dir} failed"

    fi

    chmod 700 "${netboot_dir}"

    mount -u -o ro /

    root_device=$(mount | sed -n 's:/dev/(.*) on / .*:1:p')

    case "${root_device}" in

    vn*)

        if ! touch "${netboot_shadow}" ; then

        Failed "create ${netboot_shadow} failed"

        fi

        chmod 600 "${netboot_shadow}"

            if ! /usr/libexec/vndevice shadow "/dev/r${root_device}" "${netboot_shadow}" ; then

        Failed "vndevice shadow failed"

        fi

        ;;

    "")

        Failed "root device unknown"

        ;;

    *)

        if ! touch "${netboot_shadow}" ; then

        Failed "failed to create shadow ${netboot_shadow}"

        fi

        chmod 600 "${netboot_shadow}"

        if ! /usr/bin/nbdst -recycle "${root_device}" "${netboot_shadow}" ; then

        Failed "nbdst failed" 

        fi

        ;;

    esac

}



local_mount()

{

#    tries=0

#    limit=11

#    while [ $tries -lt $limit ]; do

#   tries=$(( tries + 1 ))

#   volinfo=`autodiskmount -F 2>/dev/null`

#   if [ $? -ne 0 ]; then

#       if [ $tries -lt $limit ]; then

#       echo "Waiting for local drives..."

#       echo "Waiting for local drives (retry ${tries}/$(( limit - 1 )))..." > /dev/console

#       sleep 5

#       else

#       echo "autodiskmount -F found no local drives"

#       return 1

#       fi

#   else

#       tries=$limit

#   fi

#    done

#    set ${volinfo}

#    devname=$1

#    fstype=$2

#

#    mount -t "${fstype}" -o nosuid,nodev "/dev/${devname}" "${NETBOOT_MOUNT}" 2>&1

#    if [ $? -ne 0 ]; then

#   echo "mount of ${devname} failed"

#   return 1

#    fi

    volinfo=`autodiskmount -F 2>/dev/null`

    RAMDisk "${NETBOOT_MOUNT}"

    common_start "${NETBOOT_MOUNT}/.com.apple.NetBootX" shadowfile

    return 0

}



#

# Create a RAM disk with same perms as mountpoint

#



RAMDisk()

{

  mntpt=$1

  rdsize=2097152 #1GB ((1*1024^3)/512)=2097152, 2GB=((2*1024^3)/512)=4194304

  echo "Creating RAM Disk for $mntpt"

  dev=`hdik -drivekey system-image=yes -nomount ram://$rdsize`

  if [ $? -eq 0 ] ; then

    newfs_hfs $dev

    # save & restore fs permissions covered by the mount

    eval `/usr/bin/stat -s $mntpt`

    mount -t hfs -o union -o nobrowse $dev $mntpt

    chown $st_uid:$st_gid $mntpt

    chmod $st_mode $mntpt

    chflags hidden $mntpt

  fi

}



network_mount()

{

    mount_from=$(ipconfig netbootoption shadow_mount_path 2>&1)

    if [ $? -ne 0 ]; then

    echo "no network shadow mount path available"

    return 1

    fi

    shadow_path=$(ipconfig netbootoption shadow_file_path 2>&1)

    if [ $? -ne 0 ]; then

    echo "no network shadow file path available"

    return 1

    fi

    case "${mount_from}" in

    afp:*)

        fstype=afp

        kextutil -v 0 /System/Library/Filesystems/AppleShare/asp_tcp.kext

        kextutil -v 0 /System/Library/Filesystems/AppleShare/afpfs.kext

        ;;

    nfs:*) fstype=nfs;;

     echo "unknown network filesystem mount from ${mount_from}"

       return 1

       ;;

    esac

    mount -t "${fstype}" -o nobrowse "${mount_from}" "${NETBOOT_MOUNT}"

    if [ $? -ne 0 ]; then

    echo "mount -t ${fstype} -o nobrowse ${mount_from} ${NETBOOT_MOUNT} failed"

    return 1

    fi

    common_start "${NETBOOT_MOUNT}" "${shadow_path}"

    return 0

}



do_start()

{

    case "${NETBOOT_SHADOW}" in

    -LOCAL_ONLY- )

        err=$(local_mount)

        if [ $? -ne 0 ]; then

            Failed "${err}"

        fi

        ;;

    -LOCAL- )

        err=$(local_mount)

        if [ $? -ne 0 ]; then

            err=$(network_mount)

            if [ $? -ne 0 ]; then

            Failed "Could not find a local or network drive"

            fi

            fi

        ;;

    -NETWORK_ONLY-) 

        err=$(network_mount)

        if [ $? -ne 0 ]; then

            Failed "${err}"

        fi

        ;;



    * )

        err=$(network_mount)

        if [ $? -ne 0 ]; then

            err=$(local_mount)

            if [ $? -ne 0 ]; then

            Failed "Could not find a network or local drive"

            fi

        fi

        ;;

    esac



}



do_init()

{

    # attach the shadow file to the root disk image

    do_start



    # make sure the root filesystem is clean

    fsck -p || fsck -fy || Failed "Could not clean root filesystem"



    # make it writable

    mount -uw /



    # adjust /private/var/vm to point to the writable area (if not diskless)

    swapdir=/private/var/vm

    mounted_from=$(mount | sed -n 's:(.*) on .*/var/netboot.*:1:p')

    case "${mounted_from}" in

    /dev/*)

        netboot_dir="${NETBOOT_MOUNT}/.com.apple.NetBootX"

        if [ -d "${netboot_dir}" ]; then

            rm -rf "${swapdir}"

            ln -s "${netboot_dir}" "${swapdir}"

        fi

        ;;

    *)

    ;;

    esac



    # set the ComputerName based on what the NetBoot server told us it was

    machine_name=$(ipconfig netbootoption machine_name 2>&1)

    if [ $? -ne 0 ]; then

    echo "no machine name option available"

    else

    echo "Setting ComputerName to ${machine_name}"

    scutil --set ComputerName "${machine_name}"

    fi

}





if [ $# -lt 1 ] ; then

    exit 0

fi



command=$1



shift



case "${command}" in

    init)

    do_init $@

    ;;

esac 



##

# Exit

##

exit 0

@bwiessne This is the rc.netboot AutoCasperNBI uses.

It creates a RAM disk when using the rc.netboot option... else you can not check it & have it use a shadow file.

What is it you're looking for?

@bentoms That is the rc.netboot that is in my current netboot image but its still not booting diskless.

Casper imaging does block copy - eases the drive then installs the OS??

nitializing Imaging Process...
Mounting CasperJDS-XXXXXXXXX..
Mounting https://CasperJDS-XXXXX/CasperShareDAV/...
Preparing disk for block copy...
Performing Block Copy of osx_10.10.5_10.19.15_test.dmg...
Cleaning up after block copy...
Erasing Macintosh HD...
Installing osx_10.10.5_10.19.15.dmg...
Setting computer name to "C02N94P0G3QH"...
Creating /private/etc/jamf.conf...
Creating /usr/local/bin/jamf...
Creating jamfHelper...
Ensuring Apple's Setup Assistant does not appear...
Creating First Run Enroll Script...
Adding line for binding XXXXXX AD Bind...
Creating First Run Post Install Script...
Adding line to Fix ByHost Files...
Ensuring system files are hidden...
Unmounting Distribution Point...
Blessing System...

@bwiessne Ahh JDS, can you try this?

@bentoms we are using an Ubuntu JDS - says the script is for OS X only

@Kelly.Conrad

@bwiessne well... if you searched here for "JDS AFP" you'd find a list like: this...

There are mentions in there for "Adding an AFP Share to a JDS Instance Installed on Linux"

Just found this - Yep. I will give it a try

https://jamfnation.jamfsoftware.com/discussion.html?id=10819#responseChild61698

@bwiessne the JDS needs an AFP share for imaging.

@bentoms Sorry to bug you. Any ideas?

Thanks in advance.

@bwiessne erm? About what? For JDS imaging AFP is needed. Those links I posted & the search show JAMFs method to create an AFP share.

Once done it should work.

@bentoms - No idea why it posted my original post twice? Was not me!