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Date:      Wed, 08 Sep 1999 16:31:49 -0400
From:      Andrew Heybey <ath@niksun.com>
To:        Andrew Gallatin <gallatin@cs.duke.edu>
Cc:        freebsd-scsi@FreeBSD.ORG
Subject:   Re: data corruption when using aic7890 
Message-ID:  <199909082031.QAA74557@stiegl.niksun.com>
In-Reply-To: Your message of Wed, 08 Sep 1999 15:41:36 -0400. <14294.47942.226648.687089@grasshopper.cs.duke.edu> 

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  >>  Well, if you find anything that works, please let me know.  I've
  >> mostly abandoned this problem for now (except for prowling the
  >> mailing lists hoping to find that someone else has solved it)
  >> because I have too many other things to do and there is a
  >> workaround (use the 40MB/s connector).  However, I'd love to get
  >> my performance back...

  gallatin> What!?? You mean if I just move the cable to the 20Mhz
  gallatin> connector, all my problems will just go away???  Even
  gallatin> though its just a different port on the same PCI
  gallatin> controller? (at least on my P2B-LS)

Well, I don't know if *your* problems will go away (I'm not 100% sure
that your problem is the same as my problem).  However, my problem
went away went I moved the cable to the plain "Ultra" (20MHz)
connector rather than the "Ultra2" (40MHz) connector.

Peak performance is lower (at least with multiple disks on the bus).

Sorry, I thought that I had mentioned this someplace.  Maybe I should
submit a follow-up to the PR to mention this work-around.

andrew


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