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To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: "Yedire\, Sandeep" <syedire@gmail.com>, linux-kernel@vger.kernel.org
Subject: Re: Ext2/3 Filesystem Analysis
From: Andi Kleen <andi@firstfloor.org>
References: <AANLkTinfPl-JAP_4ZzdzJf2uyWcZ_0qfRQiT16_D8Pdd@mail.gmail.com>
	<20100609105802.62d2ddce@lxorguk.ukuu.org.uk>
Date: Wed, 09 Jun 2010 14:06:55 +0200
In-Reply-To: <20100609105802.62d2ddce@lxorguk.ukuu.org.uk> (Alan Cox's message of "Wed\, 9 Jun 2010 10\:58\:02 +0100")
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Alan Cox <alan@lxorguk.ukuu.org.uk> writes:

>> With Ext3:
>> Filesystem block at Sector 0 is being updated more frequently at ratio
>> of 5.5 to 6 times that of data block.
>> Filesystem block(super block copies) are being updated at around
>> 1.5times the frequency compared to data block.
>> 
>> Has anyone come across this kind of behaviour with these filesystems
>> on NAND Flash?
>
> ext2/3 are not intended to be used with flash - they do not wear level,

Or rather not intended to be used with flash that does not have
an own wear level layer.

-Andi
-- 
ak@linux.intel.com -- Speaking for myself only.