Date: Sun, 20 Aug 2017 09:04:05 +0100 From: Shamim Shahriar <shamim.shahriar@gmail.com> To: freebsd-questions@freebsd.org Subject: Re: Trying to recover data from a ZFS Hard disk which no zpool name Message-ID: <fb57b6ea-c441-f8f5-628c-228fd975bc58@gmail.com> In-Reply-To: <CA%2BnjGkvRN2CH=8kCGxeDRXVx0e5jK46ixsdPUzPoFY-gE6AcKw@mail.gmail.com> References: <CA%2BnjGkvRN2CH=8kCGxeDRXVx0e5jK46ixsdPUzPoFY-gE6AcKw@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On 20/08/2017 02:30, Eduardo Lemos de Sa wrote: > Dear > > I loose my main hard disk this week. There is a secondary hard dish where I > had created a zfs filesystem named zee-root at /dev/ada0p1. I replaced the > main hard disk but I couldn't recover data from the working /dev/ada0p1. I > read a lot, but I couldn't find a easy way, if there is one, to recreate > zee-root and recover data. > Here, the output from some commands; > > gpart status: > > Name Status Components > ada0p1 OK ada0 <---- so, adaop1 is there > ada1p1 OK ada1 > ada1p2 OK ada1 > ada1p3 OK ada1 > ada1p4 OK ada1 > > > gpart list: > > Geom name: ada0 > modified: false > state: OK > fwheads: 16 > fwsectors: 63 > last: 976773134 > first: 34 > entries: 128 > scheme: GPT > Providers: > 1. Name: ada0p1 > Mediasize: 500106788864 (466G) > Sectorsize: 512 > Stripesize: 0 > Stripeoffset: 1048576 > Mode: r0w0e0 > rawuuid: f1ba7289-40a0-11e7-b35b-40167ee6fc4f > rawtype: 516e7cba-6ecf-11d6-8ff8-00022d09712b > label: disk0 > length: 500106788864 > offset: 1048576 > type: freebsd-zfs > index: 1 > end: 976773119 > start: 2048 > Consumers: > 1. Name: ada0 > Mediasize: 500107862016 (466G) > Sectorsize: 512 > Mode: r0w0e0 > > Geom name: ada1 > modified: false > state: OK > fwheads: 16 > fwsectors: 63 > last: 1953523015 > first: 40 > entries: 152 > scheme: GPT > Providers: > 1. Name: ada1p1 > Mediasize: 819200 (800K) > Sectorsize: 512 > Stripesize: 0 > Stripeoffset: 20480 > Mode: r0w0e0 > rawuuid: 7bc0df74-827e-11e7-a914-40167ee6fc4f > rawtype: c12a7328-f81f-11d2-ba4b-00a0c93ec93b > label: efiboot0 > length: 819200 > offset: 20480 > type: efi > index: 1 > end: 1639 > start: 40 > 2. Name: ada1p2 > Mediasize: 524288 (512K) > Sectorsize: 512 > Stripesize: 0 > Stripeoffset: 839680 > Mode: r0w0e0 > rawuuid: 7be10150-827e-11e7-a914-40167ee6fc4f > rawtype: 83bd6b9d-7f41-11dc-be0b-001560b84f0f > label: gptboot0 > length: 524288 > offset: 839680 > type: freebsd-boot > index: 2 > end: 2663 > start: 1640 > 3. Name: ada1p3 > Mediasize: 17179869184 (16G) > Sectorsize: 512 > Stripesize: 0 > Stripeoffset: 2097152 > Mode: r1w1e0 > rawuuid: 7c06e4ed-827e-11e7-a914-40167ee6fc4f > rawtype: 516e7cb5-6ecf-11d6-8ff8-00022d09712b > label: swap0 > length: 17179869184 > offset: 2097152 > type: freebsd-swap > index: 3 > end: 33558527 > start: 4096 > 4. Name: ada1p4 > Mediasize: 983021125632 (916G) > Sectorsize: 512 > Stripesize: 0 > Stripeoffset: 2097152 > Mode: r1w1e1 > rawuuid: 7c27f290-827e-11e7-a914-40167ee6fc4f > rawtype: 516e7cba-6ecf-11d6-8ff8-00022d09712b > label: zfs0 > length: 983021125632 > offset: 17181966336 > type: freebsd-zfs > index: 4 > end: 1953521663 > start: 33558528 > Consumers: > 1. Name: ada1 > Mediasize: 1000203804160 (932G) > Sectorsize: 512 > Mode: r2w2e3 > > So, my main disk is working ... > > > glabel status: > > Name Status Components > gpt/disk0 N/A ada0p1 > gpt/efiboot0 N/A ada1p1 > msdosfs/EFI N/A ada1p1 > gpt/gptboot0 N/A ada1p2 > > > and, finally, zpool list and zpool status: > > NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT > zroot 912G 25.4G 887G - 1% 2% 1.00x ONLINE - > pool: zroot > state: ONLINE > scan: none requested > config: > > NAME STATE READ WRITE CKSUM > zroot ONLINE 0 0 0 > ada1p4 ONLINE 0 0 0 > > errors: No known data errors > > > My main HD (/dev/ada1 = 912 GB) is working as /dev/ada0, but zpool only > knows the first one. Please, could you advise me how to solve this problem? > > Thank you in advance for your attention > > My best wishes > > Eduardo > > > > > Hi Eduardo I am getting slightly confused here. You said your main HDD was lost, was that not ada0? Because you mention that there was a second hdd where you had zee-root in ada0p1 -- generally the first HDD is ada0, second one is ada1. If you lost ada0, and then replaced that with a different drive/disk, then you have already replaced whatever contained your zee-root. But later you showed you have zroot in ada1 (p4), so maybe I am mistaken. But just to be clear, can you please post the result of zpool import and zfs list so a better picture can be obtaine? Thanks
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?fb57b6ea-c441-f8f5-628c-228fd975bc58>