From owner-freebsd-current Sat May 4 04:31:47 1996 Return-Path: owner-current Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id EAA00199 for current-outgoing; Sat, 4 May 1996 04:31:47 -0700 (PDT) Received: from burka.carrier.kiev.ua (root@burka.carrier.kiev.ua [193.125.68.131]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id EAA29983 for ; Sat, 4 May 1996 04:30:41 -0700 (PDT) Received: from sivka.carrier.kiev.ua (root@sivka.carrier.kiev.ua [193.125.68.130]) by burka.carrier.kiev.ua (Sendmail 8.who.cares/5) with ESMTP id OAA27685 for ; Sat, 4 May 1996 14:28:43 +0300 Received: from elvisti.kiev.ua (uucp@localhost) by sivka.carrier.kiev.ua (Sendmail 8.who.cares/5) with UUCP id NAA02725 for current@freebsd.org; Sat, 4 May 1996 13:51:39 +0300 Received: from office.elvisti.kiev.ua (office.elvisti.kiev.ua [193.125.28.129]) by acc0.elvisti.kiev.ua (8.7.5/8.7.3) with ESMTP id OAA17740 for ; Sat, 4 May 1996 14:02:13 +0300 (EET DST) Received: (from stesin@localhost) by office.elvisti.kiev.ua (8.6.12/8.ElVisti) id OAA23402 for current@freebsd.org; Sat, 4 May 1996 14:01:42 +0300 Date: Sat, 4 May 1996 14:01:42 +0300 From: "Andrew V. Stesin" Message-Id: <199605041101.OAA23402@office.elvisti.kiev.ua> To: current@freebsd.org Subject: wdc0 flags forgotten? (was: lmbench IDE anomaly Organization: ElVisti Information center X-Newsreader: TIN [version 1.2 PL2+] Sender: owner-current@freebsd.org X-Loop: FreeBSD.org Precedence: bulk [... A discussion of IDE vs SCSI ...] People, I must notice that without adding "flags 0x80ff80ff" to the "wdc0" line in kernel config file (documented in LINT only) all that comparative testing worth definitely nothing. For my experience, adding appropriate "flags" almost trippled the performance of a drive (2.3Mb/sec vs 900Kb/sec, iozone and bonnie, Quantum Trailblazer 850Mb, SiS496/497 motherboard; with flags, drive went to 32bit I/O mode with multiblock == 8). Have a nice day! -- With best regards -- Andrew Stesin. +380 (44) 2760188 +380 (44) 2713457 +380 (44) 2713560 "You may delegate authority, but not responsibility." Frank's Management Rule #1.