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On Wed, 14 Jun 2000, Andrew Sharp wrote:
> lot of drive makers just slapped ide66 interfaces on the same HDA assemblies that
> were never designed to get more than 10MB/s sustained, if that. So what you may
> be seeing is that in raid mode you are getting more realistic results vis-a-vis
> the actual performance capabilities of the drives themselves.
Since I have very similar problems to the ones reported by Glenn, I
_know_ that this is not the problem -- because I have gotten fantastic
results using the 2.2 kernel series.
Bottom line using Bonnie for sequential reads for 2 disk IDE RAID0:
2.2.1[4-6]+RAID0.90+IDE Patches: 50 MB/s reads ** Excellent **
2.3.XX or 2.4.0-test+IDE Patches: 14 MB/s reads ** Not Good! **
There is most definitely something that changed when moving to the
development kernels.
I am using a dual P2 450 box with 256MB RAM and twin 30GB Maxtor
DiamondMax ATA-66 drives (with UDMA on) on a Promise Ultra66 controller.
Scott
-- Scott M. Ransom Phone: (781) 320-9867 Address: 75 Sanderson Ave. email: ransom@cfa.harvard.edu Dedham, MA 02026 PGP Fingerprint: D2 0E D0 10 CD 95 06 DA EF 78 FE 2B CB 3A D3 53- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
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