From owner-freebsd-hackers Thu Jul 13 11:20:47 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id LAA20294 for hackers-outgoing; Thu, 13 Jul 1995 11:20:47 -0700 Received: from uivlsi.csl.uiuc.edu (uivlsi.csl.uiuc.edu [128.174.57.133]) by freefall.cdrom.com (8.6.10/8.6.6) with SMTP id LAA20288 for ; Thu, 13 Jul 1995 11:20:45 -0700 Received: by uivlsi.csl.uiuc.edu id AA01603 (5.67b/IDA-1.3.4 for freebsd-hackers@freebsd.org); Thu, 13 Jul 1995 13:20:40 -0500 Date: Thu, 13 Jul 1995 13:20:40 -0500 From: Terry Lee Message-Id: <199507131820.AA01603@uivlsi.csl.uiuc.edu> To: freebsd-hackers@freebsd.org Subject: NCR PCI needs BOUNCE_BUFFERS? Sender: hackers-owner@freebsd.org Precedence: bulk I helped a friend install FreeBSD-2.0.5-950622-SNAP on his new Pentium PC last night. Everything went fine, so I went ahead and configured a new custom kernel for him. Since the only bus master card is an NCR 825 SCSI host adapter, I disabled BOUNCE_BUFFERS. But then the disk would only work for a few seconds before getting "COMMAND FAILED" errors. Enabling BOUNCE_BUFFERS fixed the problem. Is BOUNCE_BUFFERS needed for PCI systems with no ISA bus master cards? By the way, my friend (a Linux user) decided to give FreeBSD a try because apparently the Linux NCR driver does not support wide disks yet. He was pretty impressed by the installation program. Good job guys! Terry Lee terry@uivlsi.csl.uiuc.edu