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. 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?
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).
What can I do to get things better and faster?
And also: is this "UDMA ICRC error" because it's a Windows/DOS partition? Would formatting to FreeBSD filesystem solve the problem?
Thanks, Rob.
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