[debian-non-standard] ubifs sounds interesting

[Tomasz Chmielewski]

Martin Steigerwald schrieb:
> Hi!
> 
> Dunno tough how its chances are to go into mainline kernel. UBI is already 
> in there. And whether its also suitable for USB sticks that do wear 
> leveling on their own already.
> 
> http://kerneltrap.org/Linux/UBI_File_System

AFAIK, UBI is for flash media only.

This means it can't be used on arbitrary block devices, like USB-sticks.


Although USB-sticks do some sort of wear levelling on their own, doing 
it on the filesystem level could be still beneficial in some cases.


There is already a wear-levelling filesystem for Linux which works both 
on flash media and block devices. Additionally, it provides transparent 
compression - flash based media (like USB-sticks) is still expensive. 
The fs is called logfs and can be found on http://logfs.org


I'm not sure if logfs is stable enough right now. Last time I checked, 
it was not possible to boot the system from logfs (it was possible to 
work on such filesystem as a non-rootfs filesystem, though), was quite 
slow etc.

The things might be different/better today, though.



-- 
Tomasz Chmielewski
http://wpkg.org