On Thu, 2014-01-16 at 07:44 +, Gupta, Pekon wrote:
> However, *assuming NAND driver can identify erased-page correctly*,
> I don't want UBI/UBIFS to re-check the read_buf for 0xff again, because
> underlying NAND driver has already identified as erased-page, and
> fixed the data before passin
On Wed, 2014-01-15 at 21:29 +, Gupta, Pekon wrote:
> Hi Artem,
>
> >From: Artem Bityutskiy [mailto:artem.bityuts...@linux.intel.com]
>
> >Conclusion: all UBIFS needs is a way to ask the driver - is this NAND
> >page blank or not? UBIFS does not really has to compare to all 0xFFs.
> >
> Thanks
On Mon, 2014-01-13 at 13:16 +, Gupta, Pekon wrote:
> Currently both UBI and UBIFS layer checks for erased-page to be
> all(0xff),
> But I think its over-kill to put this burden on UBI or UBIFS layer,
> because
> low-level controller drivers can handle this easily.
> So, if Artem and Brian agree
Hi Calvin,
>From: Artem Bityutskiy [mailto:artem.bityuts...@linux.intel.com]
>>On Mon, 2014-01-13 at 17:49 +0530, Calvin Johnson wrote:
>> If the 4th to last-page are left blank and not covered with ECC, what
>> will happen in case of bit flips on the blank pages? There was an
>> issue reported so
On Mon, 2014-01-13 at 17:49 +0530, Calvin Johnson wrote:
> If the 4th to last-page are left blank and not covered with ECC, what
> will happen in case of bit flips on the blank pages? There was an
> issue reported some time back.
> http://lists.infradead.org/pipermail/linux-mtd/2012-January/039256.
Hi,
On Fri, Jan 3, 2014 at 6:29 PM, Artem Bityutskiy
wrote:
>
> Hi Pekon,
>
> On Fri, 2014-01-03 at 11:45 +, Gupta, Pekon wrote:
> > *_Case-1_ Flashing UBIFS image from u-boot using 'nand write' utility*
> >
> > For a partially written erased-block..
> > (a) 1st page is written with 'erase-he
Hi Artem,
I wanted to check the 'white-space-fixup' and re-reading your
documentation before, so got delayed in replying.
+ my mail got moderated again by mailman..
>From: Artem Bityutskiy [mailto:artem.bityuts...@linux.intel.com]
[...]
>If you are worried about fragmentation, we can discuss t
Hi Gupta,
On 03/01/2014 13:59, Artem Bityutskiy wrote:
> Basically, "ubiformat" is the "correct" UBI-aware flasher, while
> u-boot's "nand write" seems to be a dumb flasher.
It is, it is *not* recommended for UBI volume without "ubinizing" your
image.
> I guess you have 2
> options:
>
> 1. Tea
Hi Pekon,
On Fri, 2014-01-03 at 11:45 +, Gupta, Pekon wrote:
> *_Case-1_ Flashing UBIFS image from u-boot using 'nand write' utility*
>
> For a partially written erased-block..
> (a) 1st page is written with 'erase-header'
> (b) 2nd page is written with 'volume-header'
> (c) '3rd page' is wri
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