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[88.105.96.80]) by smtp.gmail.com with ESMTPSA id b19sm2224253wmj.37.2021.01.11.22.50.45 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 11 Jan 2021 22:50:45 -0800 (PST) To: freebsd-current@freebsd.org From: Graham Perrin Subject: zpool can not create a pool after using gdisk to prepare the device Message-ID: Date: Tue, 12 Jan 2021 06:50:45 +0000 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:78.0) Gecko/20100101 Thunderbird/78.6.1 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-GB X-Rspamd-Queue-Id: 4DFLnN2WMYz4VrX X-Spamd-Bar: ---- X-Spamd-Result: default: False [-4.00 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2a00:1450:4000::/36:c]; FREEMAIL_FROM(0.00)[gmail.com]; 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]; NEURAL_HAM_SHORT(-1.00)[-1.000]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RBL_DBL_DONT_QUERY_IPS(0.00)[2a00:1450:4864:20::433:from]; FREEMAIL_ENVFROM(0.00)[gmail.com]; MID_RHS_MATCH_FROM(0.00)[]; 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]; RECEIVED_SPAMHAUS_PBL(0.00)[88.105.96.80:received]; 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-current@freebsd.org]; RCPT_COUNT_ONE(0.00)[1]; SPAMHAUS_ZRD(0.00)[2a00:1450:4864:20::433:from:127.0.2.255]; RCVD_IN_DNSWL_NONE(0.00)[2a00:1450:4864:20::433:from]; RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[freebsd-current] X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 12 Jan 2021 06:50:49 -0000 I used gdisk(8) with a USB flash drive to: 1. zap (destroy) GPT data structures 2. blank out the MBR 3. (below) write a new GPT with a FreeBSD ZFS (A504) partition at /dev/da1p1 ---- root@mowa219-gjp4-8570p:~ # gdisk /dev/da1 GPT fdisk (gdisk) version 1.0.5 Partition table scan:   MBR: not present   BSD: not present   APM: not present   GPT: not present Creating new GPT entries in memory. Command (? for help): n Partition number (1-128, default 1): First sector (34-7827358, default = 2048) or {+-}size{KMGTP}: Last sector (2048-7827358, default = 7827358) or {+-}size{KMGTP}: Current type is A503 (FreeBSD UFS) Hex code or GUID (L to show codes, Enter = A503): A504 Changed type of partition to 'FreeBSD ZFS' Command (? for help): w Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING PARTITIONS!! Do you want to proceed? (Y/N): y OK; writing new GUID partition table (GPT) to /dev/da1. Warning: The kernel may continue to use old or deleted partitions. You should reboot or remove the drive. The operation has completed successfully. root@mowa219-gjp4-8570p:~ # ---- I exported the pool that used the device at /dev/da0 (preparing for a disruptive test), removed both devices then reconnected the USB flash drive. zpool can not create a pool, the file system is reportedly read-only. Please, why is this? ---- root@mowa219-gjp4-8570p:~ # tail -n 0 -f /var/log/messages Jan 12 06:44:44 mowa219-gjp4-8570p kernel: ugen0.6: at usbus0 (disconnected) Jan 12 06:44:44 mowa219-gjp4-8570p kernel: umass0: at uhub1, port 3, addr 14 (disconnected) Jan 12 06:44:44 mowa219-gjp4-8570p kernel: da0 at umass-sim0 bus 0 scbus6 target 0 lun 0 Jan 12 06:44:44 mowa219-gjp4-8570p kernel: da0:   s/n 001D0F0CAABFF97115A00A15 detached Jan 12 06:44:44 mowa219-gjp4-8570p kernel: (da0:umass-sim0:0:0:0): Periph destroyed Jan 12 06:44:44 mowa219-gjp4-8570p kernel: umass0: detached Jan 12 06:44:48 mowa219-gjp4-8570p kernel: ugen0.6: at usbus0 Jan 12 06:44:48 mowa219-gjp4-8570p kernel: umass0 on uhub1 Jan 12 06:44:48 mowa219-gjp4-8570p kernel: umass0: on usbus0 Jan 12 06:44:48 mowa219-gjp4-8570p kernel: umass0:  SCSI over Bulk-Only; quirks = 0xc100 Jan 12 06:44:48 mowa219-gjp4-8570p kernel: umass0:6:0: Attached to scbus6 Jan 12 06:44:48 mowa219-gjp4-8570p kernel: da0 at umass-sim0 bus 0 scbus6 target 0 lun 0 Jan 12 06:44:48 mowa219-gjp4-8570p kernel: da0: Removable Direct Access SCSI-2 device Jan 12 06:44:48 mowa219-gjp4-8570p kernel: da0: Serial Number 001D0F0CAABFF97115A00A15 Jan 12 06:44:48 mowa219-gjp4-8570p kernel: da0: 40.000MB/s transfers Jan 12 06:44:48 mowa219-gjp4-8570p kernel: da0: 3821MB (7827392 512 byte sectors) Jan 12 06:44:48 mowa219-gjp4-8570p kernel: da0: quirks=0x2 ^C root@mowa219-gjp4-8570p:~ # lsblk da0 DEVICE         MAJ:MIN SIZE TYPE LABEL MOUNT da0              1:247 3.7G GPT - -            -:-   1.0M -                                     - -   da0p1          1:248 3.7G freebsd-zfs gpt/efiboot0 root@mowa219-gjp4-8570p:~ # zpool create -m /media/sorry sorry /dev/da0p1 cannot open '/dev/da0p1': Read-only file system root@mowa219-gjp4-8570p:~ #