>Number:         9178
>Category:       kern
>Synopsis:       DMA error reading fsbn NNNN
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people (Kernel Bug People)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Jan 12 10:54:00 2000
>Last-Modified:
>Originator:     Torbjorn Granlund
>Organization:
Swox AB
>Release:        1.4.1
>Environment:

System: NetBSD luxemburg 1.4.1 NetBSD 1.4.1 (GENERIC) #1: Tue Aug 10 00:03:09 MEST 1999 fvdl@struis:/usr/src/sys/arch/i386/compile/GENERIC i386

motherboard ASUS P5A rev 1.06 (Ali chipset)
processor Amd K6-III/400MHz
64MB SDRAM Samsung GH
disk IDE IBM 7200rpm 9GB
cdrom IDE NEC 16x

>Description:

The machine is unbelievably slow.  `tail /var/log/messages' or `ls /etc'
take 10 seconds or more.  A hint about the cause is in /var/log/messages:

Jan 12 19:34:56 luxemburg /netbsd: wd0e: DMA error reading fsbn 180816 of 180816-180847 (wd0 bn 3072768; cn 3048 tn 6 sn 6), retrying
Jan 12 19:34:56 luxemburg /netbsd: wd0: soft error (corrected)
Jan 12 19:34:56 luxemburg /netbsd: wd0e: DMA error reading fsbn 180848 of 180848-180895 (wd0 bn 3072800; cn 3048 tn 6 sn 38), retrying
Jan 12 19:34:57 luxemburg /netbsd: wd0: soft error (corrected)
Jan 12 19:34:59 luxemburg /netbsd: wd0e: DMA error reading fsbn 764224 of 764224-764239 (wd0 bn 3656176; cn 3627 tn 2 sn 34), retrying
Jan 12 19:35:00 luxemburg /netbsd: wd0: soft error (corrected)
Jan 12 19:35:00 luxemburg /netbsd: wd0e: DMA error readinrrected)

>How-To-Repeat:

Just install NetBSD 1.4.1 on similar hardware.  You'll see the problem
already during the install, or when slowly booting the installed
machine.

>Fix:
Unknown
>Audit-Trail:
>Unformatted: