Read-only FS

[Rok]

Hi,

Have anyone tried to install Android X86 as Read-Only FS ? I use Android X86 as a kiosk and would be nice the possibility to put in read only mode to avoid file system corruption when improperly powered off (which is always the case.. :) )

Thanks

[Michael Goffioul]

By default, the system partition is read-only (unless you switch to read-write during installation). However, Android needs a data partition, and I don't think you could get away with a read-only data partition, it must be writable. You could use a tmpfs data partition, which is what the LIVE mode is doing.

There are of course other options. You could have /system and /data on different partitions, keeping /system read-only. However, there's still a risk of corrupting the /data partition. But you could tweak the boot script to check and fix the /data partition before handing it over to Android (that is, before switch_root).

I took a different approach on my hardware, although the end result is the same: I let Android mounting (and unmounting) the /data partition, by injecting the proper entry in fstab. You can then tell Android to check the partition before mounting. I did it that way, because experience demonstrated that even regular reboot could lead to data corruption, Android only properly unmounting partitions it knows about.

Hope this helps.

Michael.

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