On 16-07-15 13:36, Gary Thomas wrote:
I'd like to set up a system with a read-only root file system
along with some persistent read-write storage. What are the
[best] options in Poky/Yocto for this? Is there any support
for some type of overlay file system?
Thanks for any ideas/pointers
Depends. NOR or NAND flash?
with NOR, you can store a squashfs rootfs into it, and then use another
portion with jffs2 or ubifs for r/w capability. If you want to be able to
change 'everything', you can use an overlay fs, this requires some fiddling
with pivot_root and friends.
with NAND, you'd have to use a fault-tolerant filesystem to store the rootfs.
Dunno if it's possible to store a squashfs as a volume into ubi. The rest is
similar to NOR.
Kind regards,
Mike Looijmans
System Expert
TOPIC Embedded Products
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