答复: Cf Card vs DiskOnChip
xiaoliu.mao at mic.com.tw
Fri Jan 25 06:15:26 EST 2002
Doc surely is a good choice. Our team had made a fully embedded linux system
on it , it works ok.
发件人: David Woodhouse [mailto:dwmw2 at infradead.org]
发送时间: 2002年1月25日 18:53
收件人: Ramya Ravichandran
抄送: linux-mtd at lists.infradead.org
主题: Re: Cf Card vs DiskOnChip
rrhsin at 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.
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