From owner-freebsd-questions@FreeBSD.ORG Wed Jun 16 12:08:08 2004 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 59ECE16A4CE for ; Wed, 16 Jun 2004 12:08:08 +0000 (GMT) Received: from shockwave.systems.pipex.net (shockwave.systems.pipex.net [62.241.160.9]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5998243D2D for ; Wed, 16 Jun 2004 12:08:07 +0000 (GMT) (envelope-from mark.cullen@dsl.pipex.com) Received: from ape (81-178-78-1.dsl.pipex.com [81.178.78.1]) by shockwave.systems.pipex.net (Postfix) with SMTP id 45DE81C0041C; Wed, 16 Jun 2004 13:07:57 +0100 (BST) Message-ID: <002601c4539a$7de07eb0$f700000a@ape> From: "Markie" To: "Bill Moran" , "Rob" References: <40D00F37.7040102@users.sourceforge.net> <20040616072636.539065e6.wmoran@potentialtech.com> Date: Wed, 16 Jun 2004 13:07:09 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 cc: freebsd-questions@freebsd.org Subject: Re: Harddisk "UDMA ICRC error..." from kernel at bootup. What does it mean? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Jun 2004 12:08:08 -0000 ----- Original Message ----- From: "Bill Moran" To: "Rob" Cc: Sent: Wednesday, June 16, 2004 12:26 PM Subject: Re: Harddisk "UDMA ICRC error..." from kernel at bootup. What does it mean? | Rob wrote: | > Hi, | > | > A friend of mine switched from Windows XP to FreeBSD, because I "garanteed" that FreeBSD | > would be faster. I also want to optimize performance as much as possible. I'm therefore | > worried about the following messages from the kernel at bootup: | > | > [...snip...] | > ad0: 16448MB [33420/16/63] at ata0-master UDMA66 | > ad1: 76319MB [155061/16/63] at ata0-slave UDMA66 | > acd0: CD-RW at ata1-master PIO4 | > Mounting root from ufs:/dev/ad0s1a | > ad1s5c: UDMA ICRC error reading fsbn 93787664 of 46885768-46885895 (ad1s5 bn 93787664; cn 5838 tn 3 sn 5) retrying | > ad1s5c: UDMA ICRC error reading fsbn 93787664 of 46885768-46885895 (ad1s5 bn 93787664; cn 5838 tn 3 sn 5) retrying | > ad1s5c: UDMA ICRC error reading fsbn 93787664 of 46885768-46885895 (ad1s5 bn 93787664; cn 5838 tn 3 sn 5) retrying | > ad1s5c: UDMA ICRC error reading fsbn 93787664 of 46885768-46885895 (ad1s5 bn 93787664; cn 5838 tn 3 sn 5) falling back to PIO mode | > | > --- | > | > Both harddisks are on the same IDE 40-pin cable as master and slave. | > ad0 is the FreeBSD formatted harddisk; one slice and several FreeBSD partitions. | > ad1 is from a former Windows XP installation, with two partitions: ad1s5 (ntfs) and ad1s6 (msdos). | > | > I don't understand much of the lines above. | | Super-simplified: it's telling you it gets checksum erros when it tries to | talk to the drives at ATA66 speed, so it slows down and is then successful. | | > The last line says it falls back to PIO mode due to errors with ad1s5c. | > What does that mean? Will it use the slow 16.6 MB/s data exchange from disk to host? | | Yes. Windows is probably already running at this speed, but it just doesn't | bother to inform you. | | > Does this then also imply that both disks use PIO/slow data exchange speed? | > (remember: both disks are on the same cable to the motherboard). | | Yes. | | > What can I do to get things better and faster? | | Get an 80 conductor cable (probably). Shouldn't they be able to use ATA33 on a 40 pin cable atleast? Try atacontrol? | | > And also: is this "UDMA ICRC error" because it's a Windows/DOS partition? | > Would formatting to FreeBSD filesystem solve the problem? | | No, it's more likely because of the 40 pin cable. | | -- | Bill Moran | Potential Technologies | http://www.potentialtech.com | _______________________________________________ | freebsd-questions@freebsd.org mailing list | http://lists.freebsd.org/mailman/listinfo/freebsd-questions | To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org"