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Date: Tue, 03 Apr 2007 21:31:04 +0000 From: "Paa Paa" <paapaa125@...mail.com> To: nickpiggin@...oo.com.au, linux-kernel@...r.kernel.org Subject: Re: Lower HD transfer rate with NCQ enabled? >>Q: What conclusion can I make on "hdparm -t" results or can I make any >>conclusions? Do I really have lower performance with NCQ or not? If I do, >>is this because of my HD or because of kernel? > >What IO scheduler are you using? If AS or CFQ, could you try with deadline? I was using CFQ. I now tried with Deadline and that doesn't seem to degrade the performance at all! With Deadline I got 60MB/s both with and without NCQ. This was with "hdparm -t". So what does this tell us? _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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