Messages in this thread | | | Date | Wed, 14 Apr 2004 22:54:47 -0500 | From | Ryan Geoffrey Bourgeois <> | Subject | Re: poor sata performance on 2.6 |
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Quoting Konstantin Sobolev <kos@supportwizard.com>:
> /dev/hde: > Timing buffer-cache reads: 1436 MB in 2.00 seconds = 717.03 MB/sec > Timing buffered disk reads: 100 MB in 3.03 seconds = 32.95 MB/sec > > for sata_sil: > > /dev/sda: > Timing buffer-cache reads: 1412 MB in 2.00 seconds = 705.05 MB/sec > Timing buffered disk reads: 84 MB in 3.06 seconds = 27.43 MB/sec > > So my old IDE HDD appears to be considerably faster. Expected results were > 55-70MB/s.
Which kernel version did you get these results using? Have you speed-tested the drive(s) on a different SATA controller? I don't mean to imply that you should buy another one - that would be rediculuous since your motherboard should laready has it - but it would help to eliminate possible causes of error. I took the same readings on my machine. I'm using an ASUS SK8N motherboard - that's the Promise TX2 SATA controller - with Western Digital's 36gb 10K RPM Raptor:
/dev/sda: Timing buffer-cache reads: 128 MB in 0.12 seconds =1075.79 MB/sec Timing buffered disk reads: 64 MB in 1.20 seconds = 53.43 MB/sec
I'm using the latest stable vanilla kernel (2.6.5), compiled today. It would also help to have your kernel config, if at all possible.
-Ryan
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