On 2017-07-21 14:34, Andreas Reichel wrote:
> On Fri, Jul 21, 2017 at 02:23:13PM +0200, Jan Kiszka wrote:
>> On 2017-07-21 14:00, Andreas Reichel wrote:
>>> On Thu, Jul 20, 2017 at 08:05:31PM +0200, Jan Kiszka wrote:
>>>> On 2017-07-12 14:38, [ext] Reichel Andreas wrote:
>>
>> OK, I see.
>>
>> That makes me wonder about the following error scenario: After running
>> fine, maybe rebooting a couple of times, the latest partition suddenly
>> becomes corrupt. Can/should the previous version then act as backup? Can
>> we detect this case of "late downgrade"? Should we, after successfully
>> updating and booting a new version also update the second partition to
>> the same content, just leaving its partition revision old? I'm concern
>> of a silent fall-back to an old, potentially vulnerable version of the
>> system otherwise.
>>
> This is a really good point! I suggest to modify the confirm feature to
> also create a backup copy of the new working environment to the (latest-1)
> environment. I will add this to the TODO.md as first item. This is then
> also in agreement with the initial setup of two identical (except
> revision) environment data sets.

Sounds good.

> 
>>
>> The idea is to make this section for the common case as simple as
>> possible - if that is possible, of course.
>>
> Sure. However this was the first point I fell over and I have the
> feeling that this is important for users. Just to be user-friendly.
> That's why I wrote (>if needed<) so the user can easily skip this
> section :)

Ack.

Jan

-- 
Siemens AG, Corporate Technology, CT RDA ITP SES-DE
Corporate Competence Center Embedded Linux

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