Difference between revisions of "Fedora ARM Secondary Architecture/rootfs-resize"

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(Created page with '== The rootfs-resize script == rootfs-resize is a script included in Fedora 17 ARM and used to resize SD card images. == README == From the rootfs-resize tarball: <pre> =====…')
 
 
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[[Category:Fedora ARM Secondary Architecture]]
 
== The rootfs-resize script ==
 
== The rootfs-resize script ==
  
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rootfs-resize is a script included in Fedora 17 ARM and used to resize SD card images.
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rootfs-resize is a service written in python which resizes the root partition and filesystem to fill available space (typically on an SD card). It is used by the Fedora ARM project and may be useful with other architectures.
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== README ==
 
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From the rootfs-resize tarball:
 
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<pre>
 
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===== rootfs-resize version 0.1 - 2012-06-08 =====
 
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rootfs-resize is a simple bash script designed for use on
 
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ARM computers that use an SD card for storage. Since SD cards
 
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can be purchased in various sizes, and since even cards of the
 
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same nominal size may have slightly different capacities, it is
 
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impossible to create an SD card image guaranteed to exactly fit
 
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a card. It is also inefficient to have an image that is larger
 
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than the files contained within that image, because the "extra
 
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space" will/may slow compression, download, and SD-card burn
 
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activities.
 
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As a result, the Fedora ARM SD card images typically contain
 
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a boot filesystem (usually FAT/VFAT) followed by a Linux extX
 
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root filesystem. The second filesystem is sized so that it
 
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is just big enough for the contained files.
 
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The rootfs-resize script attempts to resize the root (second)
 
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partition on the SD card to fill the device. At present, it
 
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does this by deleting the root partition and then recreating
 
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it to fill the card; on the next boot, a background resize2fs
 
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is performed to resize the filesystem.
 
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Minimal basic sanity-checking is performed: the device containing
 
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the rootfs must contain exactly two partitions, as reported by
 
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"fdisk -l". If additional partitions have been created, the
 
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script will not run. The name of the block device containing the
 
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root filesystem must be /dev/sdX or /dev/mmcblk0pX.
 
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In order to resize the partition, the file /.rootfs-repartition
 
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must be present. After the partition resize operation, this file
 
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is removed and the file /.rootfs-resize is created; on next boot,
 
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when the resize2fs is started, the /.rootfs-resize file is
 
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removed.
 
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The operation of this script may be disabled in either of these
 
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two ways:
 
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(1) By passing a kernel command line argument of "nofsresize"
 
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(2) By creating the file /.nofsresize
 
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If either of these suppressions flags are present, the script
 
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will not run, and it will disable itself for future boots.
 
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This script and the corresponding systemd unit file are licensed
 
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under the GPL v2, or at the user's discretion, any later version.
 
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This script is being included in Fedora 17 ARM, but the Fedora
 
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ARM team intends to introduce a more advanced and robust resizing
 
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mechanism in later releases.
 
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</pre>
 
  
 
== Location ==
 
== Location ==
  
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The rootfs-resize script can be found here: http://scotland.proximity.on.ca/fedora-arm/rootfs-resize
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The rootfs-resize code can be found here: https://github.com/ctyler/rootfs-resize
  
 
== Credits ==
 
== Credits ==
  
 
Please refer to the rootfs-resize script in the package/tarball for credits.
 
Please refer to the rootfs-resize script in the package/tarball for credits.
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== Future Plans ==
 
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It is intended that this script will be replaced by a more advanced and robust mechanism in future Fedora ARM releases.
 

Latest revision as of 14:46, 14 January 2013

The rootfs-resize script

rootfs-resize is a service written in python which resizes the root partition and filesystem to fill available space (typically on an SD card). It is used by the Fedora ARM project and may be useful with other architectures.

Location

The rootfs-resize code can be found here: https://github.com/ctyler/rootfs-resize

Credits

Please refer to the rootfs-resize script in the package/tarball for credits.

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