Re: [PATCH V2] UBI: power cut emulation for testing

From: Richard Weinberger
Date: Sun Apr 05 2015 - 15:49:41 EST

On Sun, Apr 5, 2015 at 9:31 PM, Pavel Machek <pavel@xxxxxx> wrote:
> On Thu 2015-03-26 23:59:50, david.oberhollenzer@xxxxxxxxxxxxx wrote:
>> Emulate random power cuts by switching device to ro after a number of
>> writes to allow simple power cut testing with nand-sim.
>> Maximum and minimum number of successful writes before power cut and
>> what kind of writes (EC header, VID header or none) to interrupt
>> configurable via debugfs.
>> Signed-off-by: David Oberhollenzer <david.oberhollenzer@xxxxxxxxxxxxx>
>> ---
>> V2: Remove broken check to prevent multiple triggering
> Does NAND always finish write of full block during powerfail?

Not sure if I correctly understand your question.
Unless you don't have special hardware a write can be interrupted and
can cause problems.

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