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[88.105.96.80]) by smtp.gmail.com with ESMTPSA id x8sm12832103wru.70.2021.04.24.04.37.43 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 24 Apr 2021 04:37:43 -0700 (PDT) Subject: =?UTF-8?Q?Irreparable_file_systems_after_accidental_misuse_of_gpart?= =?UTF-8?Q?_bootcode_=e2=80=a6_=28EFI_Bootstrap_Question_on_13=2e0=29?= To: freebsd-questions@freebsd.org References: <2d99e813-ef5e-72ae-71fe-26b3952ee66a@johnrshannon.com> From: Graham Perrin Message-ID: Date: Sat, 24 Apr 2021 12:37:42 +0100 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:78.0) Gecko/20100101 Thunderbird/78.9.1 MIME-Version: 1.0 In-Reply-To: <2d99e813-ef5e-72ae-71fe-26b3952ee66a@johnrshannon.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-GB X-Rspamd-Queue-Id: 4FS8KQ2YxRz4q6x X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=ZkWOdytI; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of grahamperrin@gmail.com designates 2a00:1450:4864:20::42c as permitted sender) smtp.mailfrom=grahamperrin@gmail.com X-Spamd-Result: default: False [-2.00 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; FREEMAIL_FROM(0.00)[gmail.com]; R_SPF_ALLOW(-0.20)[+ip6:2a00:1450:4000::/36]; TO_DN_NONE(0.00)[]; RCVD_COUNT_THREE(0.00)[3]; DKIM_TRACE(0.00)[gmail.com:+]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; RECEIVED_SPAMHAUS_PBL(0.00)[88.105.96.80:received]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[gmail.com]; MID_RHS_MATCH_FROM(0.00)[]; RBL_DBL_DONT_QUERY_IPS(0.00)[2a00:1450:4864:20::42c:from]; ASN(0.00)[asn:15169, ipnet:2a00:1450::/32, country:US]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; FROM_HAS_DN(0.00)[]; DWL_DNSWL_NONE(0.00)[gmail.com:dkim]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-questions@freebsd.org]; RCPT_COUNT_ONE(0.00)[1]; SPAMHAUS_ZRD(0.00)[2a00:1450:4864:20::42c:from:127.0.2.255]; NEURAL_SPAM_SHORT(1.00)[0.998]; RCVD_IN_DNSWL_NONE(0.00)[2a00:1450:4864:20::42c:from]; RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[freebsd-questions] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 24 Apr 2021 11:37:47 -0000 On 19/04/2021 15:30, john via freebsd-questions wrote: > # gpart bootcode … -i 1 … In your case (and others), index 1 was the wrong target. The screenshot at demonstrates how writing bootstrap code can leave the file system not only non-mountable, but irreparable. I'm glad that you managed to recreate what's required.