data loss on jffs2 filesystem on dataflash

[Jörn Engel]

On Tue, 20 September 2005 17:11:00 +0200, Andrew Victor wrote:
> 
> > How can this reported from the flash device to the mtd layer and then to 
> > jffs2?
> 
> Via mtd_info.erasesize
> 
> > In the code, I see at the moment only, that in the device driver 
> > mtd_info.erasesize is set, later on in jffs2 I see, that this has become 
> > the sector_size, which becomes then the wbuf_pagesize.
> 
> To reduce the number of erase blocks, JFFS2 may also concatenate a
> number of erase-blocks in a 'virtual block'.  That is what sector_size
> and wbuf_pagesize might get set to.

Not any more.  That strategy can cause data loss and other fun things
which we don't want.

> > Is here mtd_info.ooblock to be set?
> 
> No.  All bytes on a DataFlash device are directly addressable, so there
> is not really an OOB area.

Jörn

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