Date: Tue, 6 Nov 2018 08:53:25 -0500 From: Alejandro Imass <aimass@yabarana.com> To: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: ZFS re attaching failed device to pool Message-ID: <CAHieY7R%2BCNNzPQwCGJW8ugy266EXXBZmF1EPs2gvacJ3=56eiA@mail.gmail.com> In-Reply-To: <CAHieY7RP9hjZ8TDqz8PFNoeo2gVY5%2BA2icA288mmvh__e1j5XA@mail.gmail.com> References: <CAHieY7RP9hjZ8TDqz8PFNoeo2gVY5%2BA2icA288mmvh__e1j5XA@mail.gmail.com>
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On Tue, Nov 6, 2018 at 8:50 AM Alejandro Imass <aimass@yabarana.com> wrote: > Dear Beasties, > > I have a simple 2 disk pool and one disk started failing and zfs put it in > a UNAVAIL status. I shut down the server and took it apart, cleaned it and > removed a third device that was on Sata Port C which I think may have been > the culprit of the bus fault. This third disk was unrelated to the pool and > was an older disk which just had some backup data and was running on an old > enclosure with the SATA wires hanging out, etc. you know, those 5 minute > hacks that you forget about.. > > After rebooting, the BIOS saw the failed device and the system booted > fine. I ran a smartctl long test on the failed device which took like 7 > hours and the report shows no errors and the device is like new. > > So now I want to tell ZFS to re-attach the device but the documentation is > not too clear about this. All the docs, and example I find is physically > replacing with another device, not the same one. > > My question is almost identical to this one which has not been answered > either: > > > https://forums.freebsd.org/threads/re-attaching-failed-device-to-pool.66027/ > > So: can I re-attach by running the replace command on the SAME device? I > haven't tried it, but from the question above it seems that it won't let > me. Besides I don't want to screw up so if anyone has done this before pls. > advise how to proceed in these cases. > > TIA! > -- > Alex > > > I forgot to mention I ran zpool clear zroot and it ran the scrub but did not put the disk back ONLINE. Here is the result: root@poseidon:~ # zpool status -v pool: zroot state: DEGRADED status: One or more devices could not be used because the label is missing or invalid. Sufficient replicas exist for the pool to continue functioning in a degraded state. action: Replace the device using 'zpool replace'. see: http://illumos.org/msg/ZFS-8000-4J scan: scrub repaired 0 in 0h8m with 0 errors on Tue Nov 6 05:27:20 2018 config: NAME STATE READ WRITE CKSUM zroot DEGRADED 0 0 0 mirror-0 DEGRADED 0 0 0 5540674508897617692 UNAVAIL 0 0 0 was /dev/diskid/DISK-WD-WCC4N6XZY8C2 diskid/DISK-WD-WCC4N2YTRX40p3 ONLINE 0 0 0 errors: No known data errors Again, TIA for any pointers on how to re-attach the failed disk. -- Alex
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