Date: Thu, 17 May 2012 20:20:09 -0500 (CDT) From: Bob Friesenhahn <bfriesen@simple.dallas.tx.us> To: Don Lewis <truckman@freebsd.org> Cc: freebsd-fs@freebsd.org Subject: Re: NAND Framework in HEAD. Message-ID: <alpine.GSO.2.01.1205172015280.21691@freddy.simplesystems.org> In-Reply-To: <alpine.GSO.2.01.1205172007270.21691@freddy.simplesystems.org> References: <201205172050.q4HKo6hK000183@gw.catspoiler.org> <alpine.GSO.2.01.1205172007270.21691@freddy.simplesystems.org>
next in thread | previous in thread | raw e-mail | index | archive | help
A further issue that flash filesystems take care of is that the nand flash erasure block size may not be the same size as the logical filesystem sector size (it may be much larger). In order to update an existing block, it may be necessary to read and re-write all of the other logical filesystem blocks which share the same erasure block. Again, this is something that SSDs already handle internally (since they use nand flash). Bob -- Bob Friesenhahn bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?alpine.GSO.2.01.1205172015280.21691>