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Date: Mon, 30 Jul 2001 10:33:05 +0800 (CST)
From: Chih-Chang Hsieh <cch@kmu.edu.tw>
Reply-To: Chih-Chang Hsieh <cch@kmu.edu.tw>
To: FreeBSD-gnats-submit@freebsd.org
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Subject: i386/29315: Promise ATA100 UDMA5 works incorrectly
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>Number:         29315
>Category:       i386
>Synopsis:       Promise ATA100 UDMA5 works incorrectly
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Jul 29 19:40:01 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Chih-Chang Hsieh
>Release:        FreeBSD 4.3-STABLE i386
>Organization:
KMU Computer Center
>Environment:
FreeBSD beta.kmu.edu.tw 4.3-STABLE FreeBSD 4.3-STABLE #1: Thu Jul 26 19:25:12 CST 2001     root@beta.kmu.edu.tw:/usr/src/sys/compile/SERVER  i386

machine: AMD Athlon 800MHz (no overclocking), 512 MB PC-100 SDRAM,
ASUS SocketA A7V motherboard (Promise PDC20265 ATA100 controller),
IBM-DTLA-307030 Hard Disk.

>Description:

	When I copy a lager file about 600MB from the HD which
ataches on ATA100 to itself under UDMA5, the new copied file
is different from the original one (checked by md5). But when I
use sysctl to switch the ATA driver from dma mode to pio mode,
the same cp command works correctly. Is this the problem of
ata driver?
	
>How-To-Repeat:

	Everytime when you copy a lager file about 600MB from the HD 
which ataches on ATA100 to itself under UDMA5 mode.

>Fix:
	Sorry, I am not able to fix it.
>Release-Note:
>Audit-Trail:
>Unformatted:

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