From owner-freebsd-scsi Thu Mar 28 14:35:22 2002 Delivered-To: freebsd-scsi@freebsd.org Received: from ns2.a1plus.at (ns2.a1plus.at [193.154.168.4]) by hub.freebsd.org (Postfix) with ESMTP id 966B837B417 for ; Thu, 28 Mar 2002 14:35:14 -0800 (PST) Received: from dialup209.d1-Bhf1.Liez.AT.KPNQwest.net (dialup209.d1-Bhf1.Liez.AT.KPNQwest.net [193.81.58.209]) by ns2.a1plus.at (8.12.2/8.12.2) with ESMTP id g2SMZAGQ004292; Thu, 28 Mar 2002 23:35:11 +0100 (MET) Date: Thu, 28 Mar 2002 23:35:01 +0100 (CET) From: Lukas Ertl X-X-Sender: le@korben.in.tern To: "Kenneth D. Merry" Cc: freebsd-scsi@FreeBSD.ORG Subject: Re: ciss driver and tagged queuing In-Reply-To: <20020328152644.A23074@panzer.kdm.org> Message-ID: <20020328232901.L214-100000@korben.in.tern> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org On Thu, 28 Mar 2002, Kenneth D. Merry wrote: > What RAID level are you using? There are significant differences (on the > smart array controller at least) between the block read and write results= =2E > With the SCSI->IDE controller, oddly, the write results are faster than t= he > read results. RAID5. I don't have a lot of experience with RAID, so I don't know if the number of disks have an influence on the result (12 80GB IDE disks in the SCSI/IDE array, 8 72GB disks in the Compaq array). > What does dmesg say about the card? From looking at the driver, it looks > like the "max outstanding commands" value that is printed out on boot wil= l > tell us how many outstanding transactions the card claims to support. Ok: ciss1: port 0x3000-0x30ff mem 0xf7e00000-0xf7efffff,0x f7fc0000-0xf7ffffff irq 3 at device 4.0 on pci7 ciss1: using 256 of 1024 available commands ciss1: 1 logical drive configured ciss1: firmware 1.76 ciss1: 2 SCSI channels ciss1: signature 'CISS' ciss1: valence 1 ciss1: supported I/O methods 0xe ciss1: active I/O method 0x3 ciss1: 4G page base 0x00000000 ciss1: interrupt coalesce delay 1000us ciss1: interrupt coalesce count 0 ciss1: max outstanding commands 1024 ciss1: bus types 0x2 ciss1: server name '' ciss1: heartbeat 0x20000022 ciss1: 1 logical drive ciss1: logical drive 0: RAID 5, 416768MB online regards, le --=20 Lukas Ertl eMail: l.ertl@univie.ac.at UNIX-Systemadministrator Tel.: (+43 1) 4277-14073 Zentraler Informatikdienst (ZID) Fax.: (+43 1) 4277-9140 der Universit=E4t Wien http://mailbox.univie.ac.at/~le/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message