Re: [PATCH 0/4] dm verity: add support for error correction

From: Austin S Hemmelgarn
Date: Mon Nov 09 2015 - 10:06:33 EST

On 2015-11-07 10:18, Mikulas Patocka wrote:

On Fri, 6 Nov 2015, Sami Tolvanen wrote:

On Fri, Nov 06, 2015 at 12:23:29PM -0500, Mikulas Patocka wrote:
Do you have some real case where such error corrections
increase longevity of some device?

Yes, there have been several cases where read-only partition errors
have rendered a device unusable. The sheer volume of mobile devices
means that even if a tiny fraction of them suffer from such a problem,
it's going to affect a large number of people.

Why don't you reflash the device from bootloader? (by holding power and
volume keys simultaneously on startup and using the fastboot utility)
Requiring an end user to re-flash their device is not good business practice, even if it is a rare occurrence (it adds a potential attack-vector for malware, and is decidedly non-trivial to do for someone without programming background). Phones, tablets, and other embedded systems are the type of thing where the device needs to be usable when the user wants to access it, period. Minimizing the chances of the device not working (even for less common causes like this patch tries to protect against) is crucial to making the user experience as good as possible (and reducing customer support costs).

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