Hardware RO & delays [DOC2000]

David Woodhouse dwmw2 at infradead.org
Fri Jan 7 11:10:23 EST 2000

dviro at lucidvon.com said:
> What's the difference between per partition and per NFTL?  Do you
> mean that there should be /dev/nftla1 and /dev/nftlb1, as opposed  to /
> dev/nftla1 and /dev/nftla2?

Yes. Of course you don't need more than one NFTL if you can have _all_ your 
filesystem read-only.

> Is there a way to tell the flash chip itself not to touch certain
> areas? 

Not really.

> > Yes, it does all its flash access, even waiting for erases to finish,
> > with interrupts disabled.

> Do you know if this is true for M-Systems' driver as well? 

I think it is.

> Are the interrupts disabled during read operations as well?  Could it
> be that the driver disables the interrupts even if the flash is not
> mounted?

During read, yes. When the flash isn't mounted, no.

> How long does it take it to finish? 

A week or so of working time, which I'm not going to get for a month or two. 
Are you volunteering?


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