Automatic Partitioning

When you flashed a “.wic”-file your system will only have one partition with almost no space. To make the filesystem usable, we provide an auto-partitioning tool called nmhw-auto-part.

Recommended settings

Run the script in interactive mode.

nmhw-auto-part -i

Press enter without entering values on all the steps.

Usage

nmhw-auto-part.sh [OPTION] 'devicename' 'size' 'mode' 'size'

Arguments

‘devicename’: device to use: e.g. /dev/sdb /dev/mmcblk1
‘size’: size of the first partition in MB (set 0 to keep current size)
‘mode’: ‘data’ or ‘overlay’; type of partition to append
‘size’: size of the appended partition in MB (set to 0 to fill)

Options

-i interactive mode
-h help

You can either pass the four arguments ‘devicename’, ‘size’, ‘mode’ and ‘size’ or one option.

Examples

nmhw-auto-part /dev/mmcblk1 1024 overlay 0

The same as running the recommended settings.

How to undo the partitioning

Delete Partition information

rm -r /etc/nmhw-auto-part
reboot
parted /dev/mmcblk1 rm 2

Rerun the autopartition script.

Note: The first partition will keep its size.

Files in /etc

/etc/nmhw-auto-part/overlay: This is an empty file. It indicates to the init script that it needs to mount an overlay.
/etc/nmhw-auto-part/data-partition: This file contains the path of the device, which serves as the data partition. It indicates to the init script that it needs to mount the data partition.