From: David Woodhouse <dwmw2@infradead.org>
To: Ramya Ravichandran <rrhsin@yahoo.co.in>
Cc: linux-mtd@lists.infradead.org
Subject: Re: Cf Card vs DiskOnChip
Date: Fri, 25 Jan 2002 10:53:20 +0000 [thread overview]
Message-ID: <4181.1011956000@redhat.com> (raw)
In-Reply-To: <20020125103941.26958.qmail@web8101.in.yahoo.com>
rrhsin@yahoo.co.in said:
>
> I am a newbie developing a embedded linux controller for an
> industrial environment. I am unable to decide whether to use a Compact
> Flash card or DiskOnChip.With 128MB I need to get the whole thing
> running. Can someone plese tell me as which one to use and why?
People have reported severe reliability problems with CF cards. With the
DiskOnChip, all the translation stuff to emulate a block device is done in
software, which is probably a better option.
The downside of the DiskOnChip is that the Linux driver doesn't do wear
levelling, although it's easy enough to add, and that the vendor's driver
is a binary-only module and hence of dubious legality.
I would go for the DiskOnChip and add wear levelling support - all you need
to do it make it randomly pick a clean block for erasure occasionally, to
make sure stuff moves around over time.
--
dwmw2
next prev parent reply other threads:[~2002-01-25 10:42 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-25 10:39 Cf Card vs DiskOnChip Ramya Ravichandran
2002-01-25 10:53 ` David Woodhouse [this message]
2002-01-25 11:16 ` Nikhil Goel
2002-01-25 11:57 ` David Woodhouse
2002-01-25 16:26 ` Richard Gooch
2002-01-25 16:50 ` David Woodhouse
2002-01-26 4:19 ` Ramya Ravichandran
2002-01-26 5:49 ` Russ Dill
2002-01-26 6:19 ` Ramya Ravichandran
2002-01-26 12:25 ` kira brown
2002-01-25 11:42 ` kira brown
2002-01-25 12:33 ` Ramya Ravichandran
2002-01-25 13:23 ` Robert Schwebel
2002-01-25 22:28 ` Chris Fowler
2002-01-25 14:14 ` Johan Adolfsson
2002-01-25 14:15 ` kira brown
[not found] <1012026130.25150.0.camel@russ>
2002-01-26 6:29 ` Ramya Ravichandran
2002-01-26 7:31 ` Charles Manning
2002-01-26 8:05 ` Ramya Ravichandran
2002-01-26 13:50 ` kira brown
2002-01-26 20:06 ` Russ Dill
2002-01-28 1:35 ` Charles Manning
2002-01-28 6:18 ` Ramya Ravichandran
2002-01-28 17:12 ` Charles Manning
2002-01-28 9:21 ` kira brown
2002-01-28 10:03 ` Ramya Ravichandran
2002-01-28 18:46 ` Alessandro Staltari
2002-01-28 10:08 ` Ramya Ravichandran
[not found] ` <Pine.LNX.4.33.0201280914130.9494-100000@hex.linuxgrrls.org >
2002-01-28 15:26 ` Mark Sienkiewicz
2002-01-26 9:16 ` David Woodhouse
2002-01-26 15:03 ` Chris Fowler
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