Date: Wed, 16 Jun 2004 13:07:09 +0100 From: "Markie" <mark.cullen@dsl.pipex.com> To: "Bill Moran" <wmoran@potentialtech.com>, "Rob" <stopspam@users.sourceforge.net> Cc: freebsd-questions@freebsd.org Subject: Re: Harddisk "UDMA ICRC error..." from kernel at bootup. What does it mean? Message-ID: <002601c4539a$7de07eb0$f700000a@ape> References: <40D00F37.7040102@users.sourceforge.net> <20040616072636.539065e6.wmoran@potentialtech.com>
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----- Original Message ----- From: "Bill Moran" <wmoran@potentialtech.com> To: "Rob" <stopspam@users.sourceforge.net> Cc: <freebsd-questions@freebsd.org> Sent: Wednesday, June 16, 2004 12:26 PM Subject: Re: Harddisk "UDMA ICRC error..." from kernel at bootup. What does it mean? | Rob <stopspam@users.sourceforge.net> 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 <WDC WD172AA> [33420/16/63] at ata0-master UDMA66 | > ad1: 76319MB <WDC WD800JB-00CRA1> [155061/16/63] at ata0-slave UDMA66 | > acd0: CD-RW <HL-DT-ST RW/DVD GCC-4320B> 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"
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