How to restore a USB drive converted to bootable

jd1008 jd1008 at
Sat May 2 15:38:07 UTC 2015

On 05/02/2015 09:29 AM, Lowell Gilbert wrote:
> "William A. Mahaffey III" <wam at> writes:
>> On 05/02/15 09:06, Lowell Gilbert wrote:
>>> "William A. Mahaffey III" <wam at> writes:
>>>> I am about to do some OS installs (NetBSD & OpenBSD, as it happens) on
>>>> boxen under construction. I would also like to use UBCD on a flash
>>>> drive to memcheck those boxen prior to installation. If I prep a USB
>>>> thumb drive as either a bootable UBCD drive or an over-the-WWW
>>>> installer, I wipe out the drive for its original use. Is there a way
>>>> to restore the drive back to its original functionality if I wanted to
>>> Is "wipe the drive and reformat" what you need to hear, or do you have
>>> more requirements that you haven't made clear?
>> Wipe & reformat, preferably from CLI under FBSD 9.3R-p13 for
>> convenience, is what I'm after. Clearly creating a bootable UBCD or
>> installer will wipe out whatever was
>> there before, so I just want to get back to 'virgin' USB drive.
All you do (as root) is

dd if=/dev/zero  of=/dev/whatever-your-usb-flash-drive's-name-is bs=1M

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