Re: UBIFS Corrupt during power failure

[Jamie Lokier <jamie@shareable.org>]

Artem Bityutskiy wrote:
> Jamie, thanks for feedback!

Thanks for the new sections in the UBI FAQ!
> Yeah...
> 
> >    That makes the range of parallel writes, and so
> >    corruption-on-power-loss, even larger than max(N * strip_size, N *
> >    block_size).  The range is as large as the whole write, if one chip
> >    is writing much faster than the others, so it cannot be represented
> >    by a small number.
> 
> Then I guess we should just introduce mtd->max_corruption ? This would
> mean maximum amount of bytes corruption may span in vase of power cuts?

With that name maybe whoever implements striping will remember think
about parallelism and limit it :-)

  /* Max size of corrupted block when a write command is interrupted
     by reset or power failure. */
  u32 max_write_corruption;

-- Jamie




> 
> -- 
> Best regards,
> Artem Bityutskiy (Битюцкий Артём)
>