Date: Tue, 24 Jun 2008 22:21:11 -0500 From: "illoai@gmail.com" <illoai@gmail.com> To: "Andrew Falanga" <af300wsm@gmail.com> Cc: Roland Smith <rsmith@xs4all.nl>, FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: Wipe a drive clean Message-ID: <d7195cff0806242021x7eef4be2vd74175056066084@mail.gmail.com> In-Reply-To: <340a29540806231336g4be401a6h5f5a1b2b6dca110e@mail.gmail.com> References: <340a29540806231257x670cf398qc5bf11c396fd0afb@mail.gmail.com> <20080623202259.GB97202@slackbox.xs4all.nl> <340a29540806231336g4be401a6h5f5a1b2b6dca110e@mail.gmail.com>
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2008/6/23 Andrew Falanga <af300wsm@gmail.com>: > On Mon, Jun 23, 2008 at 2:23 PM, Roland Smith <rsmith@xs4all.nl> wrote: >> >> I'm not sure about flash memory, but for a harddrive, simple writing 0's >> is not a secure way to delete data. It can still be recovered. > > Actually, this is for an experiment that I want to start with a > "clean" device for. I'm not actually trying to obtain some level of > security. Assuming you do not have some geom provider on said device # dd if=/dev/zero of=/dev/da2 bs=1024k count=1 should wipe the partition table and superblock, which is good enough for an insecure erase. -- --
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