From: Jamie Lokier <jamie@shareable.org>
To: "Jörn Engel" <joern@logfs.org>
Cc: linux-mtd@lists.infradead.org, Alex Dubov <oakad@yahoo.com>
Subject: Re: Support of removable MTD devices and other advanced features (follow-up from lkml)
Date: Sun, 25 May 2008 14:30:29 +0100 [thread overview]
Message-ID: <20080525133029.GA3599@shareable.org> (raw)
In-Reply-To: <20080525072501.GA13140@logfs.org>
Jörn Engel wrote:
> > Memorystick cards can be written page at a time, but only in progressive
> > fashion - only if all pages at lower offsets to the current page were written
> > before. This can be made to work as a useful optimization.
>
> The same limitation is true for some raw NAND chips as well. Afaik all
> of current MTD honors that limitation.
That seems like it would cause uneven wear-levelling in some
situations. Specifically, each time you need to erase a block which
has not been completely written, because you need to write a
contiguous record larger than the remaining space.
I don't know it was a physical requirement of some chips, thanks for
clarifying.
-- Jamie
next prev parent reply other threads:[~2008-05-25 13:30 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 [this message]
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
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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