Ok, understood. Thanks!

However, all pages that are used by yaffs should be read when the file-system is mounted, correct? 

So at least after a boot, there should be a read-access across all valid data. Or do I need some kind of "scrubbing" to be sure?


----- Ursprüngliche Mail -----
Von: "Bean Huo (beanhuo)" <beanhuo@micron.com>
An: vf@floeder.com
CC: yaffs@stoneboat.aleph1.co.uk
Gesendet: Montag, 29. Januar 2018 10:04:22
Betreff: RE: [Yaffs] Read-Only mounted YAFFS2 - refreshing of NAND pages

>
>Hi,
>
>I am wondering if the page-refresh works on a read-only mounted filesystem
>as well. However, if it would not, then some flash blocks might get
>uncorrectable read-errors after some period of time, so I'd expect that to
>work - but on the other hand, it might be a bad idea to mount read-only at
>all ...
>
>Does anybody know? Thanks!
>
>- Volker
>
>

According to my understanding, if there is read action on this read-only mounted
Partition, page-refresh will work. Even for the read-write mounted filesystem, if no read action, 
page-refresh doesn't work.
mtd layer will report bitflips to file system layer, rather than file system itself.

>
>
>
>------------------------------
>
>Subject: Digest Footer
>
>_______________________________________________
>yaffs mailing list
>yaffs@stoneboat.aleph1.co.uk
>http://stoneboat.aleph1.co.uk/cgi-bin/mailman/listinfo/yaffs
>
>
>------------------------------
>
>End of yaffs Digest, Vol 150, Issue 2
>*************************************