Rob <[EMAIL PROTECTED]> 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). > 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 _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
