Thinfs is a collection of disk managment utilities which can be used to build a filesystem.
Thinfs currently includes an implementation of:
Thinfs should be included in the full Fuchsia checkout by default.
jiri import thinfs jiri update
Thinfs will be built as a part of the Fuchsia build. Follow the instructions on the Fuchsia landing pages.
To build Thinfs exclusively, the “--modules” parameter can be provided to gn. This is useful if the rest of the build is broken, or if you're trying to incrementally rebuild Thinfs alone.
cd $FUCHSIA_ROOT ./packages/gn/gen.py --modules=thinfs ./buildtools/ninja -C out/debug-x86-64
If you have a partition (either on a hard disk or USB) which is formatted as FAT, it will be automatically detected by the Zircon kernel and mounted using thinfs under “/volume”.
If you want to manually mount a block device, use the following steps:
Use lsblk to determine which block device you'd like to mount.
Let‘s arbitrarily choose block device ‘000’. If it is formatted as FAT, you can skip to the mounting stage immediately. Otherwise, you’ll need to format it as a FAT filesystem (which, as a warning, will wipe all data present on the partition).
To format the block device:
mkfs /dev/class/block/000 fat
To mount the block device:
mount /dev/class/block/000 /mount/path/of/your/choice