From: Artem Bityutskiy <dedekind1@gmail.com>
To: Giovanni Malfara' <Giovanni.Malfara.ext@altran.it>
Cc: linux-mtd@lists.infradead.org
Subject: Re: UBI and volume checksum
Date: Thu, 07 Jun 2012 15:51:41 +0300 [thread overview]
Message-ID: <1339073501.6875.104.camel@sauron.fi.intel.com> (raw)
In-Reply-To: <0D6614B1791E3B4C86DD3784FCD9B20617B90131@XMB-TODC-23.altranit.corp.altran.com>
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On Thu, 2012-06-07 at 14:21 +0200, Giovanni Malfara' wrote:
> Hi all,
>
> I need to verify that the UBI image once it has been written on the UBI
> volume.
> So I try to extract the content with the "dd" tool from the UBI bolume
> and I calculate the checksum to be compared with the one of the original
> UBI image.
>
> My question is: is it always true? If I extract the content of the UBI
> volume at any time (the fileystem is mounted read-only) , will the
> checksum always the same? Will the data move from a PEB that has
> bit-flips to a new one cause a difference in checksum?
Yes, if you read the UBI volume (/dev/ubiX_Y), and it is R/O, the CRC
should be the same all the time.
--
Best Regards,
Artem Bityutskiy
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next prev parent reply other threads:[~2012-06-07 12:47 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-07 12:21 UBI and volume checksum Giovanni Malfara'
2012-06-07 12:51 ` Artem Bityutskiy [this message]
2012-06-07 13:13 ` Giovanni Malfara'
2012-06-18 20:22 ` Giovanni Malfara'
2012-06-27 10:58 ` Artem Bityutskiy
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