Re: choosing a file system to use on NAND/UBI

Adrian Hunter
2008-03-28T07:29:00Z

Hamish Moffatt wrote:
> I'm developing an embedded product which will have its root file system
> on NAND. The root will be pre-prepared and installed using
> flashcp/nandwrite/ubiupdatevol, and usually mounted read-only.
> Occasionally we might want to mount it read/write for debug purposes.
>
> I'm intending to use UBI for volume management and wear-levelling.
>
> JFFS2 on UBI does not seem very fast, in particular mount time and
> initial access (until cache is populated). I tried disabling compression
> but that seemed to make it worse (mount time was doubled).

Do you know that you need to have JFFS2 summary support enabled to have
reasonable mount times?