JetPack 7.2 ISO installer consistently fails when installing to USB SSD on Jetson Orin Nano Developer Kit (CurtinInstallError / NoneType / bcache)

Robotics & Edge Computing Jetson Systems Jetson Orin Nano
1

Hello NVIDIA team,

I’m trying to install JetPack 7.2 (L4T 39.2) on a Jetson Orin Nano Developer Kit using the new Jetson ISO installer, but the installation consistently fails.

Before I spend more time debugging, I’d like to confirm whether this is a known issue or whether I’m missing something.

Hardware

Device: Jetson Orin Nano Developer Kit

Firmware: Updated to JetPack 7.2 generation firmware (accepted the firmware update prompt by pressing Y during installation)

Installer ISO:jetsoninstaller-r39.2.0-2026-06-01-23-53-13-arm64.iso

Installer media:HP 128GB USB flash drive

Target device:SanDisk USB SSD

What I have already verified

Official NVIDIA ISO downloaded.

ISO flashed multiple times using Balena Etcher.

Tried three different installer USB drives.

“Check disc for defects” reports no errors.

Firmware update prompt appeared and I pressed Y.

Installer boots correctly.

Target USB SSD is detected correctly.

Installation starts successfully.

Installation path

Boot Jetson ISO.

Select Install on USB.

Choose the SanDisk USB SSD as the installation target.

Installation proceeds normally.

Failure occurs during Curtin/Subiquity installation.

Errors observed

Error 1

TypeError: ‘NoneType’ object is not iterable

Subiquity traceback points into:

apply_autoinstall_config
convert_autoinstall_config
filesystem.py

Error 2

CurtinInstallError

followed by

Unexpected error while running command

Error 3

modprobe: FATAL: Module bcache not found in directory /lib/modules/6.8.12-1021-tegra

This appears during Curtin storage processing.

Additional observations

After the installer fails:

/target is empty.

Mounting the target filesystem manually also shows that no operating system has been installed.

The traceback occurs after Curtin begins processing the storage configuration.

Documentation question

The JetPack 7.2 Quick Start Guide lists only:

microSD

NVMe SSD

as target storage prerequisites.

However, the installer itself clearly provides an Install on USB option.

Is installing Jetson Linux onto a USB SSD officially supported on JetPack 7.2 for the Jetson Orin Nano Developer Kit?

If USB installation is supported, could this be a known installer bug?

If USB installation is not currently supported, could the documentation or installer UI be updated to make that clear?

Thank you for your help.

2

Hello @pragnyanramtha!

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4

Hi,

Please refer to the Quick Start Guide — Jetson Orin Nano Developer Kit - User Guide.
We don’t support the usb ssd.

Thanks