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Date: Mon, 20 May 2002 12:12:52 +0200 (CEST)
From: Bourne-again Superuser <toor@emma.line.org>
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Subject: kern/38333: ATA drives only UDMA33 after APM standby
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>Number:         38333
>Category:       kern
>Synopsis:       ATA drives only UDMA33 after APM standby
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon May 20 03:20:02 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     Bourne-again Superuser
>Release:        FreeBSD 4.6-RC i386
>Organization:
>Environment:
System: FreeBSD emma1.emma.line.org 4.6-RC FreeBSD 4.6-RC #1: Fri May 17 04:48:20 CEST 2002 toor@emma1.emma.line.org:/usr/src/sys/compile/MA i386


	
>Description:
After waking up from APM standby mode, the IDE interfaces are reset, and
my Secondary Master (ad2), which was in UDMA 66 before, is in UDMA 33
mode henceforth.

dmesg:

resumed from suspended mode (slept 00:00:01)
ata0: resetting devices .. done
ata1: resetting devices .. ad2: DMA limited to UDMA33, non-ATA66 cable or device
done
ad2: DMA limited to UDMA33, non-ATA66 cable or device


I know for sure I have short 80-ribbon connectors for all drives,
and on initial boot-up everything is fine, dmesg again: 

ad0: 58610MB <Maxtor 4W060H4> [119081/16/63] at ata0-master UDMA66
ad2: 43979MB <IBM-DTLA-307045> [89355/16/63] at ata1-master UDMA66
ad3: 19470MB <WDC AC420400D> [39560/16/63] at ata1-slave UDMA66


This cannot be cured with atacontrol:

# atacontrol mode 1 UDMA66 UDMA66
Master = UDMA33
Slave  = UDMA66

options ATA_STATIC_ID is enabled.

Here's the list:
ATA channel 0:
    Master:  ad0 <Maxtor 4W060H4/AAH41310> ATA/ATAPI rev 6
    Slave:       no device present
ATA channel 1:
    Master:  ad2 <IBM-DTLA-307045/TX6OA6AA> ATA/ATAPI rev 5
    Slave:   ad3 <WDC AC420400D/J58OA30K> ATA/ATAPI rev 4
	
>How-To-Repeat:
apm -Z
dmesg
	
>Fix:
unknown. No workaround known other than reboot.
	


>Release-Note:
>Audit-Trail:
>Unformatted:

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