Messages in this thread | | | Date | Wed, 24 Jan 2001 14:27:08 -0600 (CST) | From | Matt Domsch <> | Subject | Re: No SCSI Ultra 160 with Adaptec Controller |
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On Wed, 24 Jan 2001, Tom Sightler wrote:
> I temporarily disabled that code and the > increase in IO's per second is measurable, though not earth shattering, but > I was afraid to leave it that way because fast corrupted data is worth much > less that only slightly slower good data.
I don't believe the problem is data corruption, but that there could be some CRC data residual from an I/O which causes the driver to issue a SCSI bus reset. As bus resets really kill performance, Doug thought it better to slow the drive to 80 rather than run at 160 and have occasional bus resets.
-- Matt Domsch Dell Linux Systems Group Linux OS Development www.dell.com/linux
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