Date: Mon, 27 Sep 2004 15:58:09 +0400 From: dima <_pppp@mail.ru> To: Arne Schwabe <arne@rfc2549.org> Cc: freebsd-current@freebsd.org Subject: Re: ATA disk performance (ICH2 controller), some tests and comparison with Linux 2.6.5 Message-ID: <1096286289.3228.3.camel@pppp> In-Reply-To: <86zn3edobp.fsf@kamino.rfc1149.org> References: <4155DC3F.5070904@freesurf.ch> <86zn3edobp.fsf@kamino.rfc1149.org>
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> > > > deleteme.now is about 488 MB, rate about 100 MB/sec!! > > > > How much ram do you have? I think Linux is tricking you here, caching > the writes in ram. Linux is "tricking" you mounting it's filesystems async by default. I was getting the same performance as in linux mounting an ufs filesystem with -o async, but in the case of copying from another (mounted with -o noatime option only fs). In either was copying from the same drive performes much worse than a linux (say, 55MB/s vs 11MB/s on a modern SCSI drive). So, it's not an ATA problem only.
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