From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.nokia.com ([192.100.122.230] helo=mgw-mx03.nokia.com) by bombadil.infradead.org with esmtps (Exim 4.69 #1 (Red Hat Linux)) id 1MseTr-0002WL-D2 for linux-mtd@lists.infradead.org; Tue, 29 Sep 2009 15:19:11 +0000 Message-ID: <4AC2247F.3030100@gmail.com> Date: Tue, 29 Sep 2009 18:15:11 +0300 From: Artem Bityutskiy MIME-Version: 1.0 To: David Lambert Subject: Re: Long attach times attaching MTD to UBI References: <4AC113E8.2030405@lambsys.com> <4AC1F018.5000207@nokia.com> In-Reply-To: <4AC1F018.5000207@nokia.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Cc: "linux-mtd@lists.infradead.org" , Adrian Hunter List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On 09/29/2009 02:31 PM, Adrian Hunter wrote: > 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? Please, measure your nand throughput withmtd_speedtest: http://www.linux-mtd.infradead.org/doc/general.html#L_mtd_tests -- Best Regards, Artem Bityutskiy (Артём Битюцкий)