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Date: Fri, 24 Mar 2000 22:19:06 -0800 (PST)
From: dforste@uswest.net
To: freebsd-gnats-submit@FreeBSD.org
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Subject: kern/17592: ata READ/WRITE command timeouts
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>Number:         17592
>Category:       kern
>Synopsis:       ata READ/WRITE command timeouts
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Mar 24 22:20:01 PST 2000
>Closed-Date:
>Last-Modified:
>Originator:     David Forster
>Release:        4.0-RELEASE
>Organization:
>Environment:
FreeBSD maridia 4.0-RELEASE FreeBSD 4.0-RELEASE #0: Fri Mar 24 02:20:42 MST 2000     root@maridia:/usr/src/sys/compile/MARIDIA  i386
>Description:
Periodicly the ata driver whill report:
ad0: READ command timeout - resetting
ata0: resetting devices .. done

This preatty consitantly happens after the hard drive has been sitting
idle for a bit (~20sec?) and then there is an IO request (a similiar
message is reported for WRITE requests)...There's a short pause (4-5sec)
and then everything works fine...

I'm running FreeBSD 4.0-RELEASE (installed from original ISO) on my Sony
PCG-748 laptop.  
The kernel reports:
atapci0: <Intel PIIX4 ATA33 controller> port 0xfcd0-0xfcdf at device 7.1 on pci0
...
ad0: 3909MB <FUJITSU MHC2040AT> [7944/16/63] at ata0-master using UDMA33
acd0: CDROM <TOSHIBA CD-ROM XM-1802B> at ata1-master using WDMA2

Basicly Generic kernel + APM, sound and minus extranous hardware
>How-To-Repeat:
Wait a bit (~20seconds) with no disk activity and then perform READ/WRITE
request on IDE drive.
>Fix:


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


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