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From: Alex Dubov <oakad@yahoo.com>
To: "Jörn" Engel <joern@logfs.org>
Cc: linux-mtd@lists.infradead.org
Subject: Re: Support of removable MTD devices and other advanced features (follow-up from lkml)
Date: Sun, 25 May 2008 19:12:41 -0700 (PDT)	[thread overview]
Message-ID: <636290.99305.qm@web36707.mail.mud.yahoo.com> (raw)
In-Reply-To: <20080525072501.GA13140@logfs.org>


--- Jörn Engel <joern@logfs.org> wrote:

> On Sat, 24 May 2008 20:41:17 -0700, Alex Dubov wrote:
> > --- Jörn Engel <joern@logfs.org> wrote:
> > 
> > > Writes happen in multiples of mtd->writesize.  Which for NAND is
> > > pagesize.  There are also special cases with subpage writes.  AFAIK only
> > > UBI exploits that feature.
> > 
> > Most xd cards can only be written a whole PEB in a time (can be handled
> with
> > appropriate writesize, I suppose).
> 
> Up to 256M writing pages at a time worked for me.  1G didn't work
> anymore.  Whether this was due to your requirement above or something
> else I didn't work out.
> 

"Smartmedia" spec kind of allows (but recommends against) single page
programming. "xD card" spec prohibits it outright starting from version 1.0.
And in fact I had some really nasty problems recently with two olympus cards
when not writing full blocks.



      

  parent reply	other threads:[~2008-05-26  2:12 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-05-20 13:59 Support of removable MTD devices and other advanced features (follow-up from lkml) Alex Dubov
2008-05-21  6:47 ` Artem Bityutskiy
2008-05-21  8:41 ` Jörn Engel
2008-05-22  1:30   ` Alex Dubov
2008-05-22 15:10     ` Jörn Engel
2008-05-23  2:47       ` Alex Dubov
2008-05-23  5:50         ` Jörn Engel
2008-05-23  9:33           ` Alex Dubov
2008-05-23  9:59             ` Jörn Engel
2008-05-23 12:49               ` Alex Dubov
2008-05-23 13:28                 ` Jörn Engel
2008-05-24 13:12                   ` Alex Dubov
2008-05-24 17:56                     ` Jörn Engel
2008-05-25  3:41                       ` Alex Dubov
2008-05-25  7:25                         ` Jörn Engel
2008-05-25 13:30                           ` Jamie Lokier
2008-05-25 16:24                             ` Jörn Engel
2008-05-25 16:35                               ` Jamie Lokier
2008-05-25 16:55                                 ` Jörn Engel
2008-05-26  2:12                           ` Alex Dubov [this message]
2008-05-21  9:06 ` David Woodhouse
2008-05-21  9:29   ` Jörn Engel
2008-05-21 15:20     ` Alex Dubov
2008-05-21 15:22       ` David Woodhouse
2008-05-21 15:41         ` Alex Dubov
2008-05-21 20:45           ` Jörn Engel

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