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Date: Tue, 29 Sep 2009 14:31:36 +0300
From: Adrian Hunter <adrian.hunter@nokia.com>
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To: David Lambert <dave@lambsys.com>
Subject: Re: Long attach times attaching MTD to UBI
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David Lambert wrote:
> Please excuse me if this is a naive question as I am a newbie to MTD and 
> flash file systems.
> 
> I am attempting to enable UBIFS on an Atmel AT91RM9200 using kernel 
> version 2.6.30.1. One of the attractions was fast mount times compared 
> to JFFS2 etc. Unfortunately I am running into VERY long attach times as 
> witnessed below. Obviously I must be doing something very wrong as the 
> documentation indicates that attaching a 1G partition should take around 
> 2 seconds, but mine is over 8 minutes!

Is your NAND slow?  Have you configured UBI debugging checks turned on?