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Date:      Tue, 23 Jun 2009 19:23:22 +0200 (CEST)
From:      Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To:        Roland Smith <rsmith@xs4all.nl>
Cc:        Gary Kline <kline@thought.org>, FreeBSD Mailing List <freebsd-questions@freebsd.org>
Subject:   Re: you're not going to believe this.
Message-ID:  <alpine.BSF.2.00.0906231922250.58723@wojtek.tensor.gdynia.pl>
In-Reply-To: <20090623170739.GA33220@slackbox.xs4all.nl>
References:  <20090622230729.GA20167@thought.org> <alpine.BSF.2.00.0906230929470.55064@wojtek.tensor.gdynia.pl> <20090623170739.GA33220@slackbox.xs4all.nl>

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>> whatever.
>
> Not so. See http://en.wikipedia.org/wiki/Flash_file_system
>
> Most flash devices sold as harddisks have hardware that emulates a
> traditional harddisk, representing it as a (P/S)ATA block device. Unless
> you can bypass this, there is no need for a special filesystem.

yes this is exactly a problem. it emulates hard disk, which lowers 
performance much. for example wear leveling and emulation small 
blocks requires moving of data within flash, this lowers both performance 
and lifetime.




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