Subject: port-i386/2776: dd with 4096K blocksize crashes machine
To: None <gnats-bugs@gnats.netbsd.org>
From: Matthias Scheler <tron@lyssa.owl.de>
List: netbsd-bugs
Date: 09/24/1996 00:26:38
>Number: 2776
>Category: port-i386
>Synopsis: dd with 4096K blocksize crashes machine
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: gnats-admin (GNATS administrator)
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Mon Sep 23 15:35:00 1996
>Last-Modified:
>Originator: Matthias Scheler
>Organization:
Matthias Scheler
tron@lyssa.owl.de
>Release: 1.2_BETA
>Environment:
System: NetBSD lyssa 1.2_BETA NetBSD 1.2_BETA (LYSSA) #0: Sat Aug 31 14:20:04 MET DST 1996 tron@lyssa:/usr/src/sys/arch/i386/compile/LYSSA i386
>Description:
Today I tried to measure the speed of my harddisk with the command
"dd if=/dev/rsd0b of=/dev/null bs=4096k". A few seconds after I
entered the command the system paniced with this message:
panic: pdti 300d063
Stopped at _Debugger+0x4: leave
I tried the same on my Amiga under NetBSD 1.2_BETA but it worked fine.
I retried with "bs=1024k" on the i386 system and it worked, too.
>How-To-Repeat:
dd if=/dev/rsd0b of=/dev/null bs=4096k
>Fix:
Sorry, I don't know.
>Audit-Trail:
>Unformatted: