some questions regarding the write operation on JFFS2

[Artem B. Bityuckiy]

On Wed, 19 Jan 2005, Vahid Fereydunkolahi wrote:

> 
> --- "Artem B. Bityuckiy" <dedekind at infradead.org>
> wrote:
> 
> > On Tue, 18 Jan 2005, Vahid Fereydunkolahi wrote:
> > 
> > > Hi All,
> > >  I traced the write operation from the Linux
> > kernel to
> > > the JFFS2. I have some questions:
> > >     1) Is there any chance that there could be
> > some
> > > partial writes on the NAND flash (if power failure
> > > happens during write operation).
> > Yes, there is chance.
> 
> Does JFFS2 guarantee that if there is a partial write
> then the data will be ignored? 
Yes it does.

> 
> > 
> > > 
> > >     2) Does SYNC has any meaning when using the
> > JFFS2.
> > > As fas as I noticed the write operations are
> > > forwarded to the MTD device, and they are not
> > cached.
> > For NAND JFFS2 has per-NAND page buffer, so sync
> > flushes it. see 
> > jffs2/wbuf.c.
> > 
> > > 
> > > Thank you so much in advance,
> > > --vahid
> > You're welcome :-)
> > 
> > > 
> > > 
> > > 		
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> > 
> > --
> > Best Regards,
> > Artem B. Bityuckiy,
> > St.-Petersburg, Russia.
> > 
> 
> 
> 
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--
Best Regards,
Artem B. Bityuckiy,
St.-Petersburg, Russia.