[SFS] how to erase the crap out of (off from?) an old RAID/LVM/whatever disk

[kevink]

Ask Hillary Clinton ;)




On 03/12/2018 10:57 AM, Chris Fedde wrote:
> I use a sledge hammer.
>
> On Sat, Mar 10, 2018 at 3:59 AM, David L. Willson 
> <DLWillson at thegeek.nu <mailto:DLWillson at thegeek.nu>> wrote:
>
>     I knew there was a tool for the job, but I couldn't remember the
>     name. Thanks for the reminder, Zack!
>
>
>
>     Sent from my Verizon, Samsung Galaxy smartphone
>
>
>     -------- Original message --------
>     From: Zack Coffey <clickwir at gmail.com <mailto:clickwir at gmail.com>>
>     Date: 3/9/18 21:38 (GMT-07:00)
>     To: "David L. Willson" <DLWillson at thegeek.nu
>     <mailto:DLWillson at thegeek.nu>>
>     Cc: sfs at lists.sofree.us <mailto:sfs at lists.sofree.us>
>     Subject: Re: [SFS] how to erase the crap out of (off from?) an old
>     RAID/LVM/whatever disk
>
>     I've used wipefs before.
>
>     http://manpages.courier-mta.org/htmlman8/wipefs.8.html
>     <http://manpages.courier-mta.org/htmlman8/wipefs.8.html>
>
>     On Mar 9, 2018 6:01 PM, "David L. Willson" <DLWillson at thegeek.nu
>     <mailto:DLWillson at thegeek.nu>> wrote:
>
>         This was hard enough to find that I want to stick in my
>         journal. Hello, journal.
>
>         ```
>         # wait for /dev/sdc to become available
>         while ! blockdev --getsz /dev/sdc; do sleep 5; done
>         # erase the tail - gets the RAID config
>         dd bs=512 if=/dev/zero of=/dev/sdc count=2048 seek=$(( $(
>         blockdev --getsz /dev/sdc ) - 2048))
>         # erase the head - gets the partition table
>         dd bs=512 if=/dev/zero of=/dev/sdc count=1024
>         # cleanly disconnects
>         eject /dev/sdc
>         ```
>
>         --
>         David L. Willson
>         Teacher, Engineer, Evangelist
>         COA LFCS CCAH RHCE CLP
>         Mobile 720-333-LANS(5267)
>         http://sofree.us
>
>         This is a good time for a r3VOLution.
>
>
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