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[85.147.130.226]) by smtp.gmail.com with ESMTPSA id n22sm1159224edr.11.2021.01.12.01.45.48 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 12 Jan 2021 01:45:49 -0800 (PST) Subject: Re: zpool can not create a pool after using gdisk to prepare the device To: freebsd-current@freebsd.org References: From: Johan Hendriks Message-ID: Date: Tue, 12 Jan 2021 10:45:46 +0100 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.16; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US X-Rspamd-Queue-Id: 4DFQgN3XVjz4h5t X-Spamd-Bar: --- X-Spamd-Result: default: False [-3.90 / 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]; NEURAL_HAM_SHORT(-0.90)[-0.902]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RBL_DBL_DONT_QUERY_IPS(0.00)[2a00:1450:4864:20::629:from]; FREEMAIL_ENVFROM(0.00)[gmail.com]; MID_RHS_MATCH_FROM(0.00)[]; TAGGED_FROM(0.00)[]; ASN(0.00)[asn:15169, ipnet:2a00:1450::/32, country:US]; DWL_DNSWL_NONE(0.00)[gmail.com:dkim]; ARC_NA(0.00)[]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; FROM_HAS_DN(0.00)[]; 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::629:from:127.0.2.255]; RCVD_IN_DNSWL_NONE(0.00)[2a00:1450:4864:20::629: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 09:45:53 -0000 On 12/01/2021 07:50, Graham Perrin wrote: > 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: DataTraveler G2> 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: G2 1.00>  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: DataTraveler G2> at usbus0 > Jan 12 06:44:48 mowa219-gjp4-8570p kernel: umass0 on uhub1 > Jan 12 06:44:48 mowa219-gjp4-8570p kernel: umass0: DataTraveler G2, class 0/0, rev 2.00/1.00, addr 15> 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: G2 1.00> 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:~ # > > It looks like it is mounted or something like that. So see with mount if it is mounted somewhere. I alway use gpart to partition disk and i never have problems. gpart destroy -F /dev/da0 gpart create -s GPT /dev/da0 gpart create -a 1M -t freebsd-zfs -l LABELNAME /dev/da0 Now you can create your pool using zpool create sorry gpt/LABELNAME This way you create your pool using the GPT labelname that never changes, and you can use it everywhere