Some news for this: [PATCH] [MTD] BLOCK_RO: Readonly Block Device Layer Over MTD ?

[Artem Bityutskiy]

On Fri, 2007-11-23 at 10:08 +0100, Ricard Wanderlof wrote:
> Does UBI periodically scan the flash for bit flips, or is the scrubbing 
> mechanism only triggered when an mtd_read() is done by a higher layer?

No, it does not do any background scanning for bit-flips. The second is
true.

If one needs some scanning, it may be implemented by making a
users-space script run by cron daemon I guess.

-- 
Best regards,
Artem Bityutskiy (Битюцкий Артём)