This should work just fine as well. The rootfs SDKM installs by default has nvresizefs.sh in /etc/systemd and a unit set up to run it in /etc/systemd/system/nvresizefs.service.
Actually, create-jetson-nano-sd-card-image.sh in Linux_for_Tegra can create a sd image of any size. sd_blob_size also accepts sizes in GB (rather than G) so you can make an image that fits a sd card exactly.
NOTE:
…Linux_for_Tegra/create-jetson-nano-sd-card-image.sh has been moved to …Linux_for_Tegra/tools/jetson-disk-image-creator.sh in JetPack 4.3
$ ./create-jetson-nano-sd-card-image.sh --help
********************************************
Jetson-Nano SD Image Creation Tool
********************************************
ERROR: This script requires root privilege
Usage:
create-jetson-nano-sd-card-image.sh -o <sd_blob_name> -s <sd_blob_size> -r <revision>
sd_blob_name - valid file name
sd_blob_size - can be specified with G/M/K/B
- size with no unit will be B
revision - SKU revision number
Example:
create-jetson-nano-sd-card-image.sh -o sd-blob.img -s 4G -r 100
create-jetson-nano-sd-card-image.sh -o sd-blob.img -s 4096M -r 200
Likewise, although the paritition is numbered mmcblk0p1 (1) if you examine the scheme in a partition editor, it is the last parititon, making it easy to expand.
However as metioned earlier, if your rootfs doesn’t have this script, or an equivalent, the filesystem will not be resized until you run resize2fs manually. If your rootfs uses systemd, I would recommend just copying over nvidia’s script to rootfs/etc/systemd/ the .service file to rootfs/etc/systemd/system and creating a symlink to that service in rootfs/etc/systemd/system/multi-user.target.wants/
You can see where all the files are supposed to be by looking in the cleanup function of nvresizefs.sh
A copy for convenience:
#!/bin/bash
# Copyright (c) 2019, NVIDIA CORPORATION. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of NVIDIA CORPORATION nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
# OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# This is a script to resize partition and filesystem on the root partition
# This will consume all un-allocated sapce on SD card after boot.
set -e
function cleanup()
{
# Delete nvresizefs.sh, nvresizefs.service and its symlink
rm "/etc/systemd/nvresizefs.sh"
rm "/etc/systemd/system/nvresizefs.service"
rm "/etc/systemd/system/multi-user.target.wants/nvresizefs.service"
}
if [ -e "/proc/device-tree/compatible" ]; then
model="$(tr -d '\0' < /proc/device-tree/compatible)"
if [[ "${model}" =~ "jetson-nano" ]]; then
model="jetson-nano"
fi
fi
if [ "${model}" != "jetson-nano" ]; then
cleanup
exit 0
fi
# Move backup GPT header to end of disk
sgdisk --move-second-header /dev/mmcblk0
# Get root partition name i.e partition No. 1
partition_name="$(sgdisk -i 1 /dev/mmcblk0 | \
grep "Partition name" | cut -d\' -f2)"
partition_type="$(sgdisk -i 1 /dev/mmcblk0 | \
grep "Partition GUID code:" | cut -d' ' -f4)"
partition_uuid="$(sgdisk -i 1 /dev/mmcblk0 | \
grep "Partition unique GUID:" | cut -d' ' -f4)"
# Get start sector of the root partition
start_sector="$(cat /sys/block/mmcblk0/mmcblk0p1/start)"
# Delete and re-create the root partition
# This will resize the root partition.
sgdisk -d 1 -n 1:"${start_sector}":0 -c 1:"${partition_name}" \
-t 1:"${partition_type}" -u 1:"${partition_uuid}" /dev/mmcblk0
# Inform kernel and OS about change in partitin table and root
# partition size
partprobe /dev/mmcblk0
# Resize filesystem on root partition to consume all un-allocated
# space on disk
resize2fs /dev/mmcblk0p1
# Clean up
cleanup