答复: Cf Card vs DiskOnChip

[xiaoliu.mao 毛曉柳]

Doc surely is a good choice. Our team had made a fully embedded linux system
on it , it works ok. 

-----原始邮件-----
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.


--
dwmw2



______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/