Date: Fri, 5 Dec 1997 23:44:10 -0200 (EDT) From: Joao Carlos Mendes Luis <jonny@coppe.ufrj.br> To: gibbs@narnia.plutotech.com (Justin T. Gibbs) Cc: freebsd-scsi@freebsd.org Subject: Re: AHC optimizations Message-ID: <199712060144.XAA25942@gaia.coppe.ufrj.br> In-Reply-To: <199712052157.OAA27773@narnia.plutotech.com> from "Justin T. Gibbs" at "Dec 5, 97 02:57:38 pm"
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Hi Justin, #define quoting(Justin T. Gibbs) // > I've read the manual for ahc(4), but could not find anything that // > could harm my configuration: // // Most likely what is happening is that the IBM drive is returning // QUEUE FULL or has some other queuing problem that causes either the // aic7xxx driver or the SCSI system to fail certain commands. Most // likely the error code isn't properly handling the situation and the // result is a panic. If you want to use tagged queuing with this drive, // you may want to run current and try a CAM kernel. This is a production machine that I still don't want to run current in it, but needs desperately more performance from disk. Do you think that just removing the AHC_TAGENABLE and leaving the others will solve the problem ? Also, do you know if there's a list of boards/disks combinations that work with tagged queueing ? In particular, would the 2940UW with Seagate Barracuda or Cheetah work ? Thanks for your answer, Jonny -- Joao Carlos Mendes Luis jonny@gta.ufrj.br +55 21 290-4698 jonny@coppe.ufrj.br Universidade Federal do Rio de Janeiro UFRJ/COPPE/CISI PGP fingerprint: 29 C0 50 B9 B6 3E 58 F2 83 5F E3 26 BF 0F EA 67
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