Date: Sat, 19 Aug 2017 22:30:38 -0300 From: Eduardo Lemos de Sa <eduardo.lemosdesa@gmail.com> To: freebsd-questions@freebsd.org Subject: Trying to recover data from a ZFS Hard disk which no zpool name Message-ID: <CA%2BnjGkvRN2CH=8kCGxeDRXVx0e5jK46ixsdPUzPoFY-gE6AcKw@mail.gmail.com>
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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 =3D 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
--=20
Eduardo Lemos de Sa
Professor Titular
Dep. Quimica da Universidade Federal do Paran=C3=A1
fone: +55(41)3361-3300
fax: +55(41)3361-3186
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