Date: 04 May 2002 16:31:00 +0930 From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: atk2@arctic.org Cc: freebsd-stable@FreeBSD.ORG Subject: Re: dd of=/dev/eide_drive bs=8192 if=/dev/mem kills system Message-ID: <1020495661.6619.7.camel@chowder.dons.net.au> In-Reply-To: <20020501141042.5400.qmail@twinlark.arctic.org> References: <20020501141042.5400.qmail@twinlark.arctic.org>
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On Wed, 2002-05-01 at 23:40, atk2@arctic.org wrote: > Anyways I then tried to test write speed with > > dd of=/dev/eide_drive bs=8192 if=/dev/mem > > and the system hanged. I forget the exact symbols for eide_drive but it > was an unmounted slice - yea I know if it worked it would have killed the > slice - but the slice is unused so I didn't care). I'm not overly concern > that the above killed the system as it isn't needed for daily use -- just > noting it in case it is a kernel bug... (not kernel didn't panic - it > hanged - I waited about 5 minutes then did a reset -- nothing responded during > that time including mouse (was running X) and hdd light on case was off) Reading /dev/mem is not a good idea. Try /dev/zero instead. -- Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 9A8C 569F 685A D928 5140 AE4B 319B 41F4 5D17 FDD5 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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