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Date:      Fri, 18 May 2012 14:10:10 +0200
From:      Maurizio Vairani <maurizio.vairani@cloverinformatica.it>
To:        Bob Friesenhahn <bfriesen@simple.dallas.tx.us>
Cc:        freebsd-fs@freebsd.org
Subject:   Re: NAND Framework in HEAD.
Message-ID:  <4FB63C22.8010902@cloverinformatica.it>
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>

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On 18/05/2012 3.10, Bob Friesenhahn wrote:
> On Thu, 17 May 2012, Don Lewis wrote:
>>
>> Any thoughts on how well NAND FS might work on SSDs as compared to
>> something like UFS, which isn't aware of the properties of the
>> underlying storage?  I would think that avoiding random block overwrites
>> would help performance and device lifetime.
>
> Filesystems designed to work with raw NAND Flash take care of issues 
> like bad block management and garbage collecting freed blocks.  These 
> are functionalities already embedded in SSDs.
>
> Even zfs avoids random block overwrites.
>
> Bob
Hi have a Root on ZFS FreeBSD 8.2 server on 3 USB Flash Disks in RAID 1 
configuration.  Is there any advantage using NAND FS instead of ZFS ?
Thanks
Maurizio





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