Re: Some additional tests run on my performance testing

From: Robert Watson (rwatson_at_freebsd.org)
Date: 08/28/03

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    Date: Wed, 27 Aug 2003 22:51:45 -0400 (EDT)
To: Bill Moran <wmoran@potentialtech.com>

    On Wed, 27 Aug 2003, Bill Moran wrote:

    > Unfortunately (as you'll see) the results were _worse_ than with FreeBSD
    > 5.1.
    ..
    > ad0s1a: UDMA ICRC error writing fsbn 1458368 of 729184-729215 (ad0s1 bn 1458368; cn 241 tn 12 sn 44) retrying
    > ad0s1a: UDMA ICRC error writing fsbn 1458368 of 729184-729215 (ad0s1 bn 1458368; cn 241 tn 12 sn 44) retrying
    > ad0s1a: UDMA ICRC error writing fsbn 1458368 of 729184-729215 (ad0s1 bn 1458368; cn 241 tn 12 sn 44) retrying
    > ad0s1a: UDMA ICRC error writing fsbn 1458368 of 729184-729215 (ad0s1 bn 1458368; cn 241 tn 12 sn 44) falling back to PIO mode

    Question: did 5.1 keep the drive as UMA, but 4.8 back it off to PIO?

    Did you look at any of the blocksize-related patches that have been
    floating around?

    Robert N M Watson FreeBSD Core Team, TrustedBSD Projects
    robert@fledge.watson.org Network Associates Laboratories

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