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Date:      Sun, 12 Jan 2003 13:19:16 -0800 (PST)
From:      "James J. Ramsey" <jjramsey_6x9eq42@yahoo.com>
To:        freebsd-bugs@freebsd.org
Subject:   Re: Semirandom bug in FreeBSD's ATA querying
Message-ID:  <20030112211916.12139.qmail@web10704.mail.yahoo.com>
In-Reply-To: <20030112201833.GA4253@HAL9000.homeunix.com>

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--- David Schultz <dschultz@uclink.Berkeley.EDU>
wrote:
> I have the same model drive as you do, and I haven't
> had any
> problems on FreeBSD 4.X or 5.0-CURRENT with any of
> three IDE
> controllers.  The line I get from dmesg is:
> 
> ad0: 19595MB <QUANTUM FIREBALLP LM20.5>
> [39813/16/63] at ata0-master UDMA66

That would shoot down the possibility that the drive,
or at least this model drive, was broken. Also would
further point to a timing issue (because of the
elusiveness of the bug).

> I have used the drive with the integrated IDE
> controllers on an
> ASUS P2B-F motherboard (440BX-based, ATA33) and an
> ASUS P3V4X
> (VIA 82C596 ATA66 controller)

For what it's worth, my motherboard is an iWill
KA266plus.

> Therefore, if you're having problems, they seem to
> be specific to
> the firmware revision of your drive, or perhaps to
> the drive
> itself. 

Or to vagarities in the motherboard's IDE controller,
or timing issues in general.

A timing bug, or a bug in the motherboard that WinXP
and Linux work around are probably the best bets.


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