Date: Thu, 19 Feb 2004 21:32:38 +0100 From: Bernd Walter <ticso@cicely12.cicely.de> To: Aaron Peterson <aaron@alpete.com> Cc: ticso@cicely.de Subject: Re: bcwipe won't wipe a block device... Message-ID: <20040219203237.GD44313@cicely12.cicely.de> In-Reply-To: <29352.162.114.211.143.1077222503.squirrel@mail.alpete.com> References: <9615.162.114.211.143.1077213472.squirrel@mail.alpete.com> <20040219201520.GB44313@cicely12.cicely.de> <29352.162.114.211.143.1077222503.squirrel@mail.alpete.com>
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On Thu, Feb 19, 2004 at 03:28:23PM -0500, Aaron Peterson wrote: > > On Thu, Feb 19, 2004 at 12:57:52PM -0500, Aaron Peterson wrote: > >> I don't know if this is a problem specific to CURRENT or not, but bcwipe > >> seems to do the right thing when wiping files. however, when using the > >> -b > >> option to wipe an entire block device, there is an "Invalid Argument" > >> error, and I don't understand exactly why... > >> > >> fbsd52# bcwipe -bvmd /dev/da0 > >> Wipe /dev/da0 (y/[n]/a)?a > >> Wiping device /dev/da0 > >> Writing to /dev/da0: Invalid argument > >> fbsd52# bcwipe -bvm3 /dev/fd0 > >> Wipe /dev/fd0 (y/[n]/a)?a > >> Wiping device /dev/fd0 > >> Writing to /dev/fd0: Invalid argument > >> fbsd52# > > > Why - if the device is there you have a node in /dev. > > If you don't have the device then there is no node. > > See devfs(8) > > I understand how devfs works, and i don't think that is the problem, > although perhaps I'm misunderstanding what you mean. > > dd if=/dev/urandom of=/dev/da0 > dd if=/dev/urandom of=/dev/fd0 > > these devices and nodes all exist, and these dd commands do as expected > and take off writing random data to the raw device. However i get the > errors mentioned previously when i try to use bcwipe on the same drives. > I would like to find a way to make bcwipe work. any suggestions about > what is causing this problem? Ah - I missunderstood you. The point is to find out what bcwipe does - e.g. by using ktrace. -- B.Walter BWCT http://www.bwct.de ticso@bwct.de info@bwct.de
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