From owner-freebsd-hardware Wed Aug 21 20:36:36 1996 Return-Path: owner-hardware Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id UAA07795 for hardware-outgoing; Wed, 21 Aug 1996 20:36:36 -0700 (PDT) Received: from paloalto.access.hp.com (daemon@paloalto.access.hp.com [15.254.56.2]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id UAA07790 for ; Wed, 21 Aug 1996 20:36:31 -0700 (PDT) Received: from srmail.sr.hp.com by paloalto.access.hp.com with ESMTP (1.37.109.16/15.5+ECS 3.3) id AA016944977; Wed, 21 Aug 1996 20:36:17 -0700 Received: from hpnmhjw.sr.hp.com by srmail.sr.hp.com with ESMTP (1.37.109.16/15.5+ECS 3.3) id AA078734976; Wed, 21 Aug 1996 20:36:16 -0700 Received: from mina.sr.hp.com by hpnmhjw.sr.hp.com with SMTP (1.37.109.16/15.5+ECS 3.3) id AA169064976; Wed, 21 Aug 1996 20:36:16 -0700 Message-Id: <199608220336.AA169064976@hpnmhjw.sr.hp.com> To: richard@pegasus.com (Richard Foulk) Cc: freebsd-hardware@FreeBSD.ORG Subject: Re: SCSI again: Asus SC200 vs. Adaptec 2940 ... In-Reply-To: Your message of "Wed, 21 Aug 1996 11:12:48 -1001." <199608212113.LAA20249@pegasus.com> Date: Wed, 21 Aug 1996 20:36:15 -0700 From: Darryl Okahata Sender: owner-hardware@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk > How do these two boards actually compare? Disregarding drivers > are they fairly similar in capability and speed? The NCR driver is quite nice. It's certainly hard to go wrong for the money. Here are some benchmarks, using an NCR815-based controller: ------------------------------------------------------------------------------- ***** Bonnie: -------Sequential Output-------- ---Sequential Input-- --Random-- -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks--- Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU PCI/Q4.0 256 3350 66.8 3387 14.8 2027 15.9 4671 90.0 6065 24.6 87.5 4.1 ***** IOZONE: $ time iozone 256 Writing the 256 Megabyte file, 'iozone.tmp'...77.492188 seconds Reading the file...43.460938 seconds IOZONE performance measurements: 3464032 bytes/second for writing the file 6176476 bytes/second for reading the file ------------------------------------------------------------------------------- This is on a P133, with 64MB 60ns parity FPM DRAM, ASUS P55T2P4 w/512K PB cache, a 4GB Quantum Atlas (34300S), and a DTC 3130B SCSI controller. Note that these measurements were *NOT* done on the outer tracks of the drive; the drive was half-full when these benchmarks were done, and so I'd guess that they were done around the tracks 1/3 of the way in. > BTW: who has the best mail-order price for these things? The NCR(now Symbios)-based controllers aren't easy to find. If you have an ASUS, the ASUS SC-200 appears to be good. If you don't have an on-board NCR BIOS, the Data Technology DTC 3130B ("B" for "BIOS") is good (it's a narrow, fast SCSI-2 controller). NECX sells it for around US$105. Very nice. [ Yes, I know that I don't need an NCR controller with a BIOS, as my ASUS motherboard has an NCR BIOS, but I had some difficulty locating an SC-200. ] -- Darryl Okahata Internet: darrylo@sr.hp.com DISCLAIMER: this message is the author's personal opinion and does not constitute the support, opinion, or policy of Hewlett-Packard, or of the little green men that have been following him all day.