From nobody Tue May 23 03:51:40 2023 X-Original-To: freebsd-hackers@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4QQL3Z2SGdz4Crtt for ; Tue, 23 May 2023 03:51:54 +0000 (UTC) (envelope-from wlosh@bsdimp.com) Received: from mail-ed1-x52a.google.com (mail-ed1-x52a.google.com [IPv6:2a00:1450:4864:20::52a]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1D4" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4QQL3Z0Hbgz3mx1 for ; Tue, 23 May 2023 03:51:53 +0000 (UTC) (envelope-from wlosh@bsdimp.com) Authentication-Results: mx1.freebsd.org; none Received: by mail-ed1-x52a.google.com with SMTP id 4fb4d7f45d1cf-510b6a24946so688035a12.0 for ; Mon, 22 May 2023 20:51:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bsdimp-com.20221208.gappssmtp.com; s=20221208; t=1684813912; x=1687405912; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=tkhLayRrNzMBDygsKqm1w8TVKRmfkcSDG5W36mPwDQI=; b=imkFs6XpruAQK9CtM7SfTBfm1XNjdUBY4sydkwLWYeaKD16GjQzJXX2+VleYaiEVmw ScTUqB2vFTqRPrL5FVW1ivUnMWDwutNuQKjfbHElsgV/wvPdDXHlZ12jqirgcbmj+d6H mnjkgR/PmyuwQNJ68YlhvmdF7H9rPgRXY6u1oOMK6gDr1F+ALMglyKezDenV5VUCKvAf qWx+eqsI5c/SVbKwLTxfoRBrlJZmmvCAdlgBeajAVJTaWoyiKferxbWBuf+ymaZocRJj G+SUb+NP34fjrwnfNTk1fJKV0nQRRmUQ7edun980e54mvXvvqW1aYSR6IcnAFvknEpwd orrg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1684813912; x=1687405912; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=tkhLayRrNzMBDygsKqm1w8TVKRmfkcSDG5W36mPwDQI=; b=iUusUWXdvOhypzeFMw/0ZxOpvBAvT9SOA3U+8dbRvs2k6NcOj1DNMAHcE+Lkkzgj+J BNNc8YlDM1D62D4iqkD2vFDyUEjcCpc8C7Ap6YX27Qg0Yioi2t12UyAdSJGpPkXNCYgc Xwqf1GhxIbnEzv+tQbpSwE9pdXbI2cXsk+RX8b8Hvu3xxKhM4vCilc1r6aC3VTBelwPh XZNbNqmiMZldYtqHgK0lYgGbGr/IdV3UsIcC0i07rfzfSm0kLEkv36YJHIO/CrQo0C2u 8tL97M5W8xH3kK2RLjijgDGdeaJWVMdCIgvc39i3qU1p/JbAkCCKhiaCipM3FQopuUz0 eOQQ== X-Gm-Message-State: AC+VfDzVHjMfi1H9uZlOUgzyCgeHxy6LHuUVS32KaXeRpIq1KhxHJGUo FR+jhJCLbYXR0A+ZLceszrFPQ3YdH2vwB7plRXILcns6857mXnT6 X-Google-Smtp-Source: ACHHUZ5q2mKq48f4aGftHTsaj2cVOXvw2KHLQMzYzeezp4w757YLpJGuAh51qtTOEZGXGr4CC6zlXgd6Rla01JVGMkQ= X-Received: by 2002:a17:907:98e:b0:960:ddba:e5c3 with SMTP id bf14-20020a170907098e00b00960ddbae5c3mr12251487ejc.32.1684813911932; Mon, 22 May 2023 20:51:51 -0700 (PDT) List-Id: Technical discussions relating to FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-hackers List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-hackers@freebsd.org MIME-Version: 1.0 References: In-Reply-To: From: Warner Losh Date: Mon, 22 May 2023 21:51:40 -0600 Message-ID: Subject: Re: gpart destroy efi partition? To: Steve Kargl Cc: FreeBSD Hackers Content-Type: multipart/alternative; boundary="000000000000bbd09605fc544e7a" X-Rspamd-Queue-Id: 4QQL3Z0Hbgz3mx1 X-Spamd-Bar: ---- X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[]; ASN(0.00)[asn:15169, ipnet:2a00:1450::/32, country:US] X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-ThisMailContainsUnwantedMimeParts: N --000000000000bbd09605fc544e7a Content-Type: text/plain; charset="UTF-8" On Mon, May 22, 2023, 9:45 PM Steve Kargl wrote: > Is there a secret incantation for destroying an EFI > partition on a USB memstick? After installing FreeBSD, > I would like to re-use a memstick, but > > % gpart destroy da0 > gpart: geom 'da0': Read-only file system > % gpart destroy -F da0 > gpart: geom 'da0': Read-only file system > % gpart show da0 > => 40 60063664 da0 GPT (29G) > 40 60063664 1 ms-basic-data (29G) > % gpart delete -i 1 da0 > gpart: geom 'da0': Read-only file system > % dd if=/dev/zero of=/dev/da0 bs=1m > dd: /dev/da0: Read-only file system > What's mounted? Warner -- > Steve > > --000000000000bbd09605fc544e7a Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


On Mon, May 22, 2023, 9:45 PM Steve Kargl <sgk@troutmask.apl.washington.e= du> wrote:
Is there a secret= incantation for destroying an EFI
partition on a USB memstick?=C2=A0 After installing FreeBSD,
I would like to re-use a memstick, but

% gpart destroy da0
gpart: geom 'da0': Read-only file system
% gpart destroy -F da0
gpart: geom 'da0': Read-only file system
% gpart show da0
=3D>=C2=A0 =C2=A0 =C2=A0 40=C2=A0 60063664=C2=A0 da0=C2=A0 GPT=C2=A0 (29= G)
=C2=A0 =C2=A0 =C2=A0 =C2=A0 40=C2=A0 60063664=C2=A0 =C2=A0 1=C2=A0 ms-basic= -data=C2=A0 (29G)
% gpart delete -i 1 da0
gpart: geom 'da0': Read-only file system
% dd if=3D/dev/zero of=3D/dev/da0 bs=3D1m
dd: /dev/da0: Read-only file system

What's mounted?

Warner=C2=A0

--
Steve

--000000000000bbd09605fc544e7a--